You can't play lands.

Sacrifice a land: Draw two cards. Activate only once each turn.

Defender

When Akroan Horse enters the battlefield, an opponent gains control of it.

At the beginning of your upkeep, each opponent creates a 1/1 white Soldier creature token.

At the beginning of your upkeep, put a muster counter on Assemble the Legion. Then create a 1/1 red and white Soldier creature token with haste for each muster counter on Assemble the Legion.

At the beginning of your upkeep, put a filibuster counter on Azor's Elocutors. Then if Azor's Elocutors has five or more filibuster counters on it, you win the game.

Whenever a source deals damage to you, remove a filibuster counter from Azor's Elocutors.

{1}, {T}: Add {W}{U}.

{T}: Target player gains control of target artifact, creature, or land you control.

Choose an opponent. You and that player each create three 1/1 white Spirit creature tokens with flying.

Choose an opponent. You gain 2 life for each creature you control and that player gains 2 life for each creature they control.

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)

Artifacts and creatures your opponents control enter the battlefield tapped.

{T}: Flip a coin. If you win the flip, destroy all nonland permanents.

{1}, {T}: Add {R}{W}.

Draw three cards, then put two cards from your hand on top of your library in any order.

Gain control of all permanents you own. (This effect lasts indefinitely.)

Cycling {2} ({2}, Discard this card: Draw a card.)

Each player draws three cards, then discards three cards at random.

{3}, Sacrifice Burnished Hart: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Flash

When Cast Out enters the battlefield, exile target nonland permanent an opponent controls until Cast Out leaves the battlefield.

Cycling {W} ({W}, Discard this card: Draw a card.)

Whenever you win a coin flip, put a luck counter on Chance Encounter.

At the beginning of your upkeep, if Chance Encounter has ten or more luck counters on it, you win the game.

Lands you control have "{T}: Add one mana of any color."

{T}: Add one mana of any color.

Will of the council -- At the beginning of your upkeep, starting with you, each player votes for carnage or homage. If carnage gets more votes, sacrifice Coercive Portal and destroy all nonland permanents. If homage gets more votes or the vote is tied, draw a card.

{T}: Add one mana of any color in your commander's color identity.

Sacrifice Commander's Sphere: Draw a card.

Whenever an artifact, creature, or enchantment enters the battlefield, its controller chooses target permanent another player controls that shares a card type with it. Exchange control of those permanents.

Will of the council -- Starting with you, each player votes for a nonland permanent you don't control. Exile each permanent with the most votes or tied for most votes.

No more than two creatures can attack you each combat.

Whenever a creature attacks you or a planeswalker you control, it gets +2/+0 until end of turn.

{2}: Target player other than Crown of Doom's owner gains control of it. Activate only during your turn.

Enchant player

Whenever enchanted player is attacked, create a Gold token. Each opponent attacking that player does the same. (A Gold token is an artifact with "Sacrifice this artifact: Add one mana of any color.")

Enchant creature

Enchanted creature has "At the beginning of your upkeep, target opponent gains control of this creature unless you sacrifice a land."

{U}, {T}: Each player reveals the top card of their library. You may put the revealed cards into their owners' graveyards. If you don't, each player draws a card.

Indestructible

{T}: Add one mana of any color.

Each player shuffles their hand and graveyard into their library, then draws seven cards. If it's your turn, end the turn. (Exile all spells and abilities from the stack, including this card. Discard down to your maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)

{T}: Add {C}.

{1}{U}{R}, {T}: Draw a card, then discard a card.

Flash

At the beginning of each player's draw step, that player draws an additional card.

Each player can't cast more than one spell each turn.

{2}, {T}: You gain 5 life. Shuffle Elixir of Immortality and your graveyard into their owner's library.

Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Destroy all lands.

II, III -- Each player returns two land cards from their graveyard to the battlefield.

At the beginning of each opponent's upkeep, that player chooses draw step, main phase, or combat phase. The player skips each instance of the chosen step or phase this turn.

{T}: Add {C}.

{2}, {T}: Each player draws a card, then discards a card.

{T}: Add three mana of any one color.

{W}{U}, {T}: Put a bribery counter on target creature you don't control. Its controller draws a card.

Creatures with bribery counters on them can't attack or block.

Target opponent gains control of target permanent you control.

{T}: Add {C}.

{T}: Each player gains control of all creatures they own.

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

Each player may bid life for control of target creature. You start the bidding with a bid of 0. In turn order, each player may top the high bid. The bidding ends if the high bid stands. The high bidder loses life equal to the high bid and gains control of the creature. (This effect lasts indefinitely.)

Cast this spell only during the declare blockers step on an opponent's turn.

Remove all attacking creatures from combat and untap them. After this phase, there is an additional combat phase. Each of those creatures attacks that combat if able. They can't attack you or planeswalkers you control that combat.

Cumulative upkeep {2} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

When Illusions of Grandeur enters the battlefield, you gain 20 life.

When Illusions of Grandeur leaves the battlefield, you lose 20 life.

Untap all creatures and gain control of them until end of turn. They gain haste until end of turn.

Choose an opponent. You and that player each draw three cards.

Choose an opponent. Untap all nonland permanents you control and all nonland permanents that player controls.

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

+2: Each player draws a card.

-1: Target player draws a card.

-10: Target player mills twenty cards.

At the beginning of your end step, target opponent gains control of Jinxed Choker and puts a charge counter on it.

At the beginning of your upkeep, Jinxed Choker deals damage to you equal to the number of charge counters on it.

{3}: Put a charge counter on Jinxed Choker or remove one from it.

At the beginning of each player's draw step, that player draws an additional card.

{T}: Add {C}.

{1}{R}, {T}: Create a 0/1 red Kobold creature token named Kobolds of Kher Keep.

Imprint -- When Knowledge Pool enters the battlefield, each player exiles the top three cards of their library.

Whenever a player casts a spell from their hand, that player exiles it. If the player does, they may cast a spell from among other cards exiled with Knowledge Pool without paying its mana cost.

If you would draw a card while your library has no cards in it, you win the game instead.

At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle.

You have no maximum hand size.

If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.

{T}: Put a charge counter on Lux Cannon.

{T}, Remove three charge counters from Lux Cannon: Destroy target permanent.

Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.

Creatures with power 3 or greater don't untap during their controllers' untap steps.

{T}: Add {C}.

{2}, {T}: Each player draws a card.

{T}: Add {C}.

{1}, {T}, Sacrifice Mind Stone: Draw a card.

Join forces -- Starting with you, each player may pay any amount of mana. Each player draws X cards, where X is the total amount of mana paid this way.

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

Mystic Monastery enters the battlefield tapped.

{T}: Add {U}, {R}, or {W}.

+1: Look at the top card of your library. If it's a noncreature, nonland card, you may reveal it and put it into your hand.

-2: When you cast your next instant or sorcery spell from your hand this turn, it gains rebound. (Exile the spell as it resolves. At the beginning of your next upkeep, you may cast that card from exile without paying its mana cost.)

-9: You get an emblem with "Your opponents can't cast noncreature spells."

Flying

Whenever you draw a card, Niv-Mizzet, the Firemind deals 1 damage to any target.

{T}: Draw a card.

({W/P} can be paid with either {W} or 2 life.)

Creatures can't attack you or planeswalkers you control unless their controller pays {W/P} for each of those creatures.

When Oblivion Ring enters the battlefield, exile another target nonland permanent.

When Oblivion Ring leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Choose left or right. Starting with you and proceeding in the chosen direction, each player chooses a creature controlled by the next player in that direction. Each player gains control of the creature they chose.

{T}: Put a charge counter on Otherworld Atlas.

{T}: Each player draws a card for each charge counter on Otherworld Atlas.

Whenever an opponent casts a spell, you may exchange control of Perplexing Chimera and that spell. If you do, you may choose new targets for the spell. (If the spell becomes a permanent, you control that permanent.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

At the beginning of your upkeep, flip a coin. If you lose the flip, sacrifice Planar Chaos.

Whenever a player casts a spell, that player flips a coin. If they lose the flip, counter that spell.

Assist (Another player can pay up to {6} of this spell's cost.)

Exile all nonland permanents.

Will of the council -- Starting with you, each player votes for time or knowledge. If time gets more votes, take an extra turn after this one. If knowledge gets more votes or the vote is tied, draw three cards.

Until end of turn, each creature target player controls loses all abilities and becomes a blue Frog with base power and toughness 1/1.

Look at the top three cards of your library, then put them back in any order. You may shuffle.

Draw a card.

Whenever a player taps a land for mana, if it's not that player's turn, destroy that land.

{T}: Add {C}.

{1}, {T}: Add one mana of any color.

Whenever you draw a card, each opponent mills two cards.

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand.

Whenever you draw a card, each opponent loses 1 life.

At the beginning of your upkeep, you may exchange control of target nonland permanent you control and target nonland permanent an opponent controls with an equal or lesser mana value.

{T}: Add one mana of any color. An opponent gains control of Rainbow Vale at the beginning of the next end step.

+1: Tap target permanent, then untap another target permanent.

-2: Ral Zarek deals 3 damage to any target.

-7: Flip five coins. Take an extra turn after this one for each coin that comes up heads.

You have no maximum hand size.

{T}: Add {C}.

Redistribute any number of players' life totals. (Each of those players gets one life total back.)

At the beginning of each player's upkeep, that player gains control of Risky Move.

When you gain control of Risky Move from another player, choose a creature you control and an opponent. Flip a coin. If you lose the flip, that opponent gains control of that creature.

Flying

At the beginning of your upkeep, sacrifice an artifact other than Rust Elemental. If you can't, tap Rust Elemental and you lose 4 life.

No more than one creature can attack each combat.

No more than one creature can block each combat.

{T}: Add {C}{C}.

When Solemn Simulacrum enters the battlefield, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

When Solemn Simulacrum dies, you may draw a card.

{T}: Choose a player. That player adds one mana of any color they choose.

Creatures can't attack you or planeswalkers you control unless their controller pays {X} for each of those creatures, where X is the number of enchantments you control.

Whenever you draw a card, target opponent mills two cards. If two nonland cards that share a color were milled this way, repeat this process.

{5}{U}: Draw a card, then discard a card.

Star Compass enters the battlefield tapped.

{T}: Add one mana of any color that a basic land you control could produce.

You can't cast creature spells.

{T}: Add {C}.

{T}, Sacrifice Strip Mine: Destroy target land.

Return all lands to their owners' hands.

Exile target creature. Its controller gains life equal to its power.

At the beginning of each player's draw step, that player puts the cards in their hand on the bottom of their library in any order, then draws that many cards.

+1: Draw a card. At the beginning of the next end step, untap up to two lands.

-3: Put target nonland permanent into its owner's library third from the top.

-8: You get an emblem with "Whenever you draw a card, exile target permanent an opponent controls."

{T}: Each player draws a card.

Tempting offer -- Create X 1/1 red Elemental creature tokens with haste. Each opponent may create X 1/1 red Elemental creature tokens with haste. For each opponent who does, create X 1/1 red Elemental creature tokens with haste.

{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Flying

Whenever you draw a card, create a 1/1 blue and red Insect creature token with flying and haste.

{2}{U}{R}: Draw a card, then discard a card.

When The Locust God dies, return it to its owner's hand at the beginning of the next end step.

You have no maximum hand size.

{T}: Add {C}.

{T}: Add {C}{C}{C}.

+1: Draw a card, then discard a card at random.

-4: Tibalt, the Fiend-Blooded deals damage equal to the number of cards in target player's hand to that player.

-6: Gain control of all creatures until end of turn. Untap them. They gain haste until end of turn.

Each player shuffles their hand and graveyard into their library, then draws seven cards. Exile Time Reversal.

When Vedalken Plotter enters the battlefield, exchange control of target land you control and target land an opponent controls.

Whenever an opponent taps a land for mana, tap all lands that player controls.

If a creature an opponent controls attacks, all creatures that opponent controls attack if able.

When Well of Ideas enters the battlefield, draw two cards.

At the beginning of each other player's draw step, that player draws an additional card.

At the beginning of your draw step, draw two additional cards.

Any number of target opponents each discard their hands, then draw seven cards.

Draw a card.

Suspend 4--{1}{R} (Rather than cast this card from your hand, pay {1}{R} and exile it with four time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.)

Each player discards their hand, then draws seven cards.

Each player discards their hand, then draws seven cards.

Starting with you, each player separates all permanents they control into three piles. Then each player chooses one of their piles at random and sacrifices those permanents. (Piles can be empty.)

{1}{W}: Search your library for an enchantment card and reveal that card. Put it into your hand, then discard a card at random. Then shuffle.

{1}{U}: Search your library for an instant card and reveal that card. Put it into your hand, then discard a card at random. Then shuffle.

Each player shuffles the cards from their hand into their library, then draws that many cards.

You draw two cards, then each other player draws a card.

At the beginning of your upkeep, you gain X life and draw X cards, where X is the number of permanents you own that your opponents control.

{U}{R}{W}: Target opponent gains control of target permanent you control.