Whenever you cast a spell, you gain 1 life for each spell you've cast this turn.

Pay 50 life: Aetherflux Reservoir deals 50 damage to any target.

{T}: Add {C}{C}. Ancient Tomb deals 2 damage to you.

Exile target nonland permanent. You lose 3 life.

Arcane Sanctum enters the battlefield tapped.

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

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

{2}, {T}: Add {B} for each Swamp you control.

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

{T}: Add one mana of any color.

Target player shuffles their graveyard into their library.

Draw a card.

{T}: Add {C}.

{T}, Sacrifice Command Beacon: Put your commander into your hand from the command zone.

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

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

Sacrifice Commander's Sphere: Draw a card.

Flying

Whenever an opponent draws a card, you may draw two cards.

Destroy all creatures. They can't be regenerated.

If you control a commander, you may cast this spell without paying its mana cost.

Exile target creature.

Search your library for a card, put that card into your hand, then shuffle.

Deserted Beach enters the battlefield tapped unless you control two or more other lands.

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

Exile target permanent with mana value 4 or greater.

Flash

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

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

Flying, double strike, lifelink

Whenever you gain life, draw a card.

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

Flashback {2}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is Esper Sentinel's power.

{T}: Add one mana of any color that a land an opponent controls could produce.

Whenever an opponent loses life, you gain that much life.

Whenever an opponent draws a card, Fate Unraveler deals 1 damage to that player.

{T}, Exile Feldon's Cane: Shuffle your graveyard into your library.

Vigilance, lifelink

At the beginning of your upkeep, if you have 40 or more life, you win the game.

If you control a commander, you may cast this spell without paying its mana cost.

Counter target noncreature spell.

{T}, Pay 1 life, Sacrifice Flooded Strand: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.

You may pay 1 life and exile a blue card from your hand rather than pay this spell's mana cost.

Counter target spell.

Skulk (This creature can't be blocked by creatures with greater power.)

At the beginning of your upkeep, you may discard all the cards in your hand. If you do, draw that many cards.

{T}: Add {C}.

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

({T}: Add {W} or {B}.)

As Godless Shrine enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

During your turn, your opponents can't cast spells or activate abilities of artifacts, creatures, or enchantments.

Search your library for a card, put that card into your hand, then shuffle. You lose 3 life.

({T}: Add {W} or {U}.)

As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

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

{U}, {T}: Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.

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

+1: Target player mills two cards. Draw a card.

-8: Draw seven cards. Then if your library has no cards in it, you win the game.

Flash

At the beginning of your end step, draw seven cards.

Each opponent's maximum hand size is reduced by seven.

Whenever you cast an artifact, instant, or sorcery spell, copy that spell. You may choose new targets for the copy. This ability triggers only once each turn. (A copy of a permanent spell becomes a token.)

Whenever an opponent casts an artifact, instant, or sorcery spell, counter that spell. This ability triggers only once each turn.

Whenever an opponent casts a noncreature spell, that player loses 2 life and you gain 2 life.

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

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

If Leyline of Anticipation is in your opening hand, you may begin the game with it on the battlefield.

You may cast spells as though they had flash.

Hexproof

You can't lose the game.

Whenever you gain life, draw that many cards.

Whenever you lose life, for each 1 life you lost, exile a permanent you control or a card from your hand or graveyard.

When Lich's Mastery leaves the battlefield, you lose the game.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)

Equip {0}

Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.

Mana Vault doesn't untap during your untap step.

At the beginning of your upkeep, you may pay {4}. If you do, untap Mana Vault.

At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you.

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

Whenever you gain life, each opponent loses 1 life.

{T}: Add {C}.

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

Morphic Pool enters the battlefield tapped unless you have two or more opponents.

{T}: Add {U} or {B}.

({T}: Add {U}.)

Mystic Sanctuary enters the battlefield tapped unless you control three or more other Islands.

When Mystic Sanctuary enters the battlefield untapped, you may put target instant or sorcery card from your graveyard on top of your library.

Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.

If damage would be dealt to you, exile that many cards from your graveyard instead. If you can't, you lose the game.

If you would gain life, draw that many cards instead.

When Nefarious Lich leaves the battlefield, you lose the game.

Whenever a creature deals damage to you, destroy it.

Whenever an opponent draws a card, Ob Nixilis, the Hate-Twisted deals 1 damage to that player.

-2: Destroy target creature. Its controller draws two cards.

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

Target player draws cards equal to half the number of cards in their library and loses half their life. Round up each time.

At the beginning of your upkeep, you draw a card and you lose 1 life.

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

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.

Whenever you draw a card, target opponent loses 1 life and you gain 1 life.

({T}: Add {W}, {U}, or {B}.)

Raffine's Tower enters the battlefield tapped.

Cycling {3} ({3}, Discard this card: Draw a card.)

You have no maximum hand size.

{T}: Add {C}.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Whenever you gain life, target opponent loses that much life.

({T}: Add {W} or {B}.)

Sea of Clouds enters the battlefield tapped unless you have two or more opponents.

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

{1}: Look at the top three cards of your library, then put them back in any order.

{T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.

Shattered Sanctum enters the battlefield tapped unless you control two or more other lands.

{T}: Add {W} or {B}.

Shipwreck Marsh enters the battlefield tapped unless you control two or more other lands.

{T}: Add {U} or {B}.

No more than one creature can attack each combat.

No more than one creature can block each combat.

Whenever an opponent draws a card, that player may pay {2}. If the player doesn't, you create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

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

You have no maximum hand size.

Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.

If you would draw a card except the first one you draw in each of your draw steps, draw two cards instead.

Until your next turn, your life total can't change and you gain protection from everything. All permanents you control phase out. (While they're phased out, they're treated as though they don't exist. They phase in before you untap during your untap step.)

Exile Teferi's Protection.

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.

You may activate loyalty abilities of Teferi, Master of Time on any player's turn any time you could cast an instant.

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

-3: Target creature you don't control phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)

-10: Take two extra turns after this one.

Each opponent can cast spells only any time they could cast a sorcery.

+1: Until your next turn, you may cast sorcery spells as though they had flash.

-3: Return up to one target artifact, creature, or enchantment to its owner's hand. Draw a card.

{T}: Add {C}{C}. Activate only if you control five or more lands.

All creatures have "At the beginning of your upkeep, destroy this creature unless you pay {1}."

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

As an additional cost to cast this spell, pay X life.

All creatures get -X/-X until end of turn.

({T}: Add {U} or {B}.)

Each land is a Swamp in addition to its other land types.

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

I -- Urza's Saga gains "{T}: Add {C}."

II -- Urza's Saga gains "{2}, {T}: Create a 0/0 colorless Construct artifact creature token with 'This creature gets +1/+1 for each artifact you control.'"

III -- Search your library for an artifact card with mana cost {0} or {1}, put it onto the battlefield, then shuffle.

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

This spell costs {1} less to cast for each creature on the battlefield.

Destroy all creatures.

Vault of Champions enters the battlefield tapped unless you have two or more opponents.

{T}: Add {W} or {B}.

You have no maximum hand size.

At the beginning of your upkeep, you gain 1 life for each card in your hand.

Flying

{B}, Pay 2 life: Target creature gets -1/-1 until end of turn.

Whenever you lose life, draw that many cards. (Damage causes loss of life.)

Destroy target permanent.

Whenever you gain life, target opponent loses that much life.

{3}{B}{B}: Creatures you control gain lifelink until end of turn.

({T}: Add {U} or {B}.)

As Watery Grave enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.

Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

At the beginning of each end step, each opponent loses life equal to the life they lost this turn. (Damage causes loss of life.)