You may discard a Plains card rather than pay this spell's mana cost.

Destroy target artifact or enchantment.

Whenever a creature enters the battlefield, Aether Flash deals 2 damage to it.

Remove all counters from all permanents and exile all tokens.

Counter target artifact spell.

Creatures your opponents control enter the battlefield tapped.

Whenever a creature enters the battlefield under an opponent's control, you gain 1 life.

Counter target instant or Aura spell that targets a permanent you control.

Nonbasic lands don't untap during their controllers' untap steps.

{T}: Put a bounty counter on target nonblack creature.

{T}: Destroy target creature with a bounty counter on it.

Players can cast spells and activate abilities only during their own turns.

{T}: Add {C}.

{R}{G}, {T}: Target Beast creature you control fights target creature an opponent controls. (Each deals damage equal to its power to the other.)

Cumulative upkeep {1} (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.)

At the beginning of your upkeep, put a rust counter on each artifact target opponent controls. Then destroy each artifact with mana value less than or equal to the number of rust counters on it. Artifacts destroyed this way can't be regenerated.

When Corrosion leaves the battlefield, remove all rust counters from all permanents.

Tap two untapped creatures you control: You may put a creature card from your hand that shares a creature type with each creature tapped this way onto the battlefield.

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

You may return an Island you control to its owner's hand rather than pay this spell's mana cost.

Counter target spell unless its controller pays {1}.

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

Target creature gets -1/-1 until end of turn for each Swamp you control.

Search your library and graveyard for five cards and exile the rest. Put the chosen cards on top of your library in any order. You lose half your life, rounded up.

Whenever a creature you control attacks, put a charge counter on Druids' Repository.

Remove a charge counter from Druids' Repository: Add one mana of any color.

Cumulative upkeep {1} (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.)

Black creatures can't attack you.

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

Each player who has cast a nonartifact spell this turn can't cast additional nonartifact spells.

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Threshold -- If seven or more cards are in your graveyard, instead search your library for up to three basic land cards, put them onto the battlefield tapped, then shuffle.

{T}: Add {W}.

When Flagstones of Trokair is put into a graveyard from the battlefield, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle.

Target opponent chooses a card in your graveyard. You may pay {G}. If you do, repeat this process except that opponent can't choose a card already chosen for Forgotten Lore. Then put the last chosen card into your hand.

Players can't gain life.

At the beginning of each player's upkeep, that player loses 1 life.

Whenever Forsaken Wastes becomes the target of a spell, that spell's controller loses 5 life.

{5}, Sacrifice Gauntlets of Chaos: Exchange control of target artifact, creature, or land you control and target permanent an opponent controls that shares one of those types with it. If those permanents are exchanged this way, destroy all Auras attached to them.

Counter target blue instant spell.

At the beginning of each player's upkeep, that player chooses a color. Until end of turn, lands tapped for mana produce mana of the chosen color instead of any other color.

{T}: Add {C}.

{1}{W}, {T}: Put target enchantment card from your graveyard on top of your library.

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

Target creature gets +X/+0 until end of turn.

Counter target artifact or enchantment spell. Its controller gains life equal to its mana value.

Change the target of target spell with a single target. You lose life equal to that spell's mana value.

At the beginning of your upkeep, sacrifice Koskun Falls unless you tap an untapped creature you control.

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

Enchant creature

Whenever enchanted creature becomes blocked, you may have it deal damage equal to its power to target creature. If you do, the first creature assigns no combat damage this turn.

Whenever a creature enters the battlefield, destroy it.

{0}: Destroy Lethal Vapors. You skip your next turn. Any player may activate this ability.

Each player exiles all creature cards from their graveyard, then sacrifices all creatures they control, then puts all cards they exiled this way onto the battlefield.

Cast this spell only during combat.

Your opponents can't cast spells this turn.

End the combat phase. (Remove all attackers and blockers from combat. Exile all spells and abilities from the stack, including this spell.)

Devoid (This card has no color.)

Mindmelter can't be blocked.

{3}{C}: Target opponent exiles a card from their hand. Activate only as a sorcery. ({C} represents colorless mana.)

Exchange your graveyard and library. Then shuffle your library.

Imprint -- {T}: Exile target artifact card from a graveyard.

Myr Welder has all activated abilities of all cards exiled with it.

Each player who controls six or more lands chooses five lands they control and sacrifices the rest. Each player who controls four or fewer lands may search their library for up to X basic land cards and put them onto the battlefield, where X is five minus the number of lands they control. Then each player who searched their library this way shuffles.

As Null Chamber enters the battlefield, you and an opponent each choose a card name other than a basic land card name.

Spells with the chosen names can't be cast and lands with the chosen names can't be played.

Kicker {W} (You may pay an additional {W} as you cast this spell.)

Target player can't cast spells this turn. If this spell was kicked, creatures can't attack this turn.

At the beginning of your upkeep, sacrifice Peacekeeper unless you pay {1}{W}.

Creatures can't attack.

Cumulative upkeep {B} (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.)

At the beginning of your end step, draw a card for each age counter on Phyrexian Etchings.

When Phyrexian Etchings is put into a graveyard from the battlefield, you lose 2 life for each age counter on it.

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

Choose target instant or sorcery spell that targets only a single permanent or player. Copy that spell for each other permanent or player the spell could target. Each copy targets a different one of those permanents and players.

Untap all creatures you control and all creatures target opponent controls. You and that opponent each gain control of all creatures the other controls until end of turn. Those creatures gain haste until end of turn.

Enchant creature

Enchanted creature loses all abilities and is a Coward creature with base power and toughness 0/1. (It keeps all supertypes but loses all other types and creature types.)

Choose one --

• Draw cards equal to the greatest power among non-Human creatures you control.

• Non-Human creatures you control get +3/+3 until end of turn.

Players play with their hands revealed.

Artifacts and lands enter the battlefield tapped.

Counter target activated ability from an artifact source. (Mana abilities can't be targeted.)

Creatures with flying get +1/+1.

{T}: Add {B}.

{B}, {T}: Target legendary creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Menace

At the beginning of your upkeep, reveal the top card of your library. Any opponent may have you put that card into your graveyard. If a player does, Sin Prodder deals damage to that player equal to that card's mana value. Otherwise, put that card into your hand.

Whenever a creature enters the battlefield, destroy all other creatures that share a color with it. They can't be regenerated.

Counter target activated or triggered ability. (Mana abilities can't be targeted.)

Whenever a creature enters the battlefield, its controller sacrifices a creature or land.

Spells and abilities your opponents control can't cause you to sacrifice permanents.

Each noncreature artifact loses all abilities and becomes an artifact creature with power and toughness each equal to its mana value. If Titania's Song leaves the battlefield, this effect continues until end of turn.

Cumulative upkeep {1}{B} (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.)

At the beginning of each upkeep, if Tombstone Stairwell is on the battlefield, each player creates a 2/2 black Zombie creature token with haste named Tombspawn for each creature card in their graveyard.

At the beginning of each end step or when Tombstone Stairwell leaves the battlefield, destroy all tokens created with Tombstone Stairwell. They can't be regenerated.

{T}: Add {C}.

{1}, {T}: Target creature gains protection from artifacts until end of turn.

At the beginning of your upkeep, choose one --

• Each player with exactly 13 life loses the game, then each player gains 1 life.

• Each player with exactly 13 life loses the game, then each player loses 1 life.

{X}, {T}, Discard a card: Look at the top X cards of your library. You may put a creature card with mana value X or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.

({C} represents colorless mana.)

Choose one --

• Exile target creature with power or toughness 1 or less.

• Counter target sorcery spell.

• Create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}."