Put X -1/-1 counters on each creature. Shuffle Black Sun's Zenith into its owner's library.

As an additional cost to cast this spell, sacrifice a creature. Destroy target creature.

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

You may play an additional land this turn. Draw a card.

Search your library for a green creature card with mana value X or less, put it onto the battlefield, then shuffle. Shuffle Green Sun's Zenith into its owner's library.

Put a -1/-1 counter on target creature, two -1/-1 counters on another target creature, and three -1/-1 counters on a third target creature.

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

As an additional cost to cast this spell, put a -1/-1 counter on a creature you control. Destroy target creature.

Choose two — • Target player gains 7 life. • Put target noncreature permanent on top of its owner's library. • Target player shuffles their graveyard into their library. • Search your library for a creature card, reveal it, put it into your hand, then shuffle.

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

Search your library for up to two Forest cards, put them onto the battlefield, then shuffle.

Search your library for a Forest card, put it onto the battlefield, then shuffle.

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

When Contagion Clasp enters, put a -1/-1 counter on target creature. {4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When this artifact enters, put a -1/-1 counter on each creature target player controls. {4}, {T}: Proliferate twice. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)

{T}: Add {B} or {G}. {B/G}{B/G}{B/G}{B/G}, {T}, Sacrifice this artifact: Draw two cards.

This artifact enters with three arrowhead counters on it. At the beginning of your upkeep, if there are no arrowhead counters on this artifact, sacrifice it. {T}, Remove an arrowhead counter from this artifact: Put a -1/-1 counter on target creature.

Equipped creature gets +1/-1. Whenever equipped creature dies, draw two cards. Equip {1}

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

{T}: Add {C}. {T}: Add {B} or {G}. This artifact deals 1 damage to you.

This artifact enters with three charge counters on it. {B}{B}, {T}: Put a charge counter on this artifact. {2}, {T}, Remove a charge counter from this artifact: Put a -1/-1 counter on target creature.

Cumulative upkeep—Put a -1/-1 counter on this creature. (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 this creature enters, you may put a -1/-1 counter on target creature. {B}, Sacrifice this creature: Destroy target creature that has a -1/-1 counter on it.

Whenever this creature or another creature dies, target player loses 1 life and you gain 1 life.

Flying This creature enters with two -1/-1 counters on it. {B}, Remove a -1/-1 counter from this creature: Put a -1/-1 counter on each other creature.

Creatures with power less than this creature's power can't block creatures you control. Whenever another creature you control enters, put a +1/+1 counter on this creature.

When this creature enters, put three -1/-1 counters on target creature you control. {T}, Remove a -1/-1 counter from this creature: Add one mana of any color.

Black creatures you control have wither. (They deal damage to creatures in the form of -1/-1 counters.)

Haste When this creature enters, creatures you control gain trample and get +X/+X until end of turn, where X is the number of creatures you control.

Other black creatures you control get +1/+1. Other green creatures you control get +1/+1. At the beginning of your upkeep, you may create a 1/1 black and green Worm creature token.

{T}: Add {G}. Put a -1/-1 counter on this creature: Untap this creature.

When this creature enters, put three -1/-1 counters on target creature you control. Whenever this creature attacks, remove a -1/-1 counter from it. If you do, you gain 1 life.

Whenever a player casts a spell, you may put a +1/+1 counter on this creature. At the beginning of your upkeep, you may move any number of +1/+1 counters from this creature onto other creatures.

When this creature enters, support 2. (Put a +1/+1 counter on each of up to two other target creatures.) Whenever you put one or more counters on a creature you don't control, draw a card.

Wither (This deals damage to creatures in the form of -1/-1 counters.) At the beginning of your upkeep, put a -1/-1 counter on each nonblack creature.

Wither (This deals damage to creatures in the form of -1/-1 counters.) Whenever a creature an opponent controls with a -1/-1 counter on it dies, you may return that card to the battlefield under your control.

Reach Whenever this creature deals combat damage to a creature, put a -1/-1 counter on that creature. Whenever you put one or more -1/-1 counters on a creature, each opponent loses 1 life and you gain 1 life.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) {T}: Add {C}.

{T}, Sacrifice a creature: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Flying When this creature enters, put target creature card from an opponent's graveyard onto the battlefield under your control. It gains haste. At the beginning of your next end step, exile it. Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

{B/G}, Remove a -1/-1 counter from a creature you control: This creature gets +3/+3 until end of turn.

When this creature enters, you may destroy target artifact or enchantment.

Other Snake creatures you control get +2/+2. Whenever a Snake you control deals combat damage to a player, you may draw a card.

When this creature enters, you may destroy up to three target noncreature permanents. For each permanent put into a graveyard this way, its controller creates a 3/3 green Elephant creature token.

{T}: Until end of turn, target creature has base power 1 or base toughness 1.

Sacrifice a creature: Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

This creature enters with a -1/-1 counter on it. {G}, Remove a -1/-1 counter from this creature: Destroy target artifact or enchantment.

Protection from Humans Pay 1 life, Sacrifice another creature: Put a -1/-1 counter on up to one target creature and draw a card. {B}{B}, Discard a card: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature.

At the beginning of your upkeep, destroy target creature with a -1/-1 counter on it.

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

Flash Whenever a creature you control dies, each opponent sacrifices a creature of their choice.

Whenever a -1/-1 counter is put on a creature, you may create a 1/1 green Elf Warrior creature token.

Destroy target permanent an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.

Put a -1/-1 counter on target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Destroy target nonblack creature. At the beginning of your next upkeep, pay {2}{B}. If you don't, you lose the game.