Sacrifice a creature: Add {C}{C}.

{T}: Choose any number of target creatures. Each of those creatures gains persist until end of turn. (When it 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.)

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

Sacrifice a creature: Put a charge counter on Spawning Pit. {1}, Remove two charge counters from Spawning Pit: Create a 2/2 colorless Spawn artifact creature token.

Put a +1/+1 counter on each creature you control.

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

Whenever another nontoken creature you control enters, bolster 1. (Choose a creature with the least toughness among creatures you control and put a +1/+1 counter on it.)

Flying, vigilance, lifelink Fabricate 2 (When this creature enters, put two +1/+1 counters on it or create two 1/1 colorless Servo artifact creature tokens.) Other creatures you control get +1/+1.

Undying (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.)

This creature can't block. Sacrifice a creature: Put a +1/+1 counter on this creature.

Whenever another creature you control enters, each opponent loses 1 life.

Lifelink Whenever another creature dies, put a +1/+1 counter on Elenda. When Elenda dies, create X 1/1 white Vampire creature tokens with lifelink, where X is Elenda's power.

Vigilance Other creatures you control get +2/+2. Creatures your opponents control get -2/-2.

Fabricate 1 (When this creature enters, put a +1/+1 counter on it or create a 1/1 colorless Servo artifact creature token.)

Morph {B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) Whenever another nontoken creature you control dies, draw a card.

Flying Whenever a creature you control without flying dies, return it to the battlefield under its owner's control with a flying counter on it.

When this creature dies, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

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.)

Flying Whenever an opponent casts a spell, put a +1/+1 counter on this creature and you gain 1 life.

Whenever a creature token leaves the battlefield, put a +1/+1 counter on this creature. {2}{W}, Remove a +1/+1 counter from this creature: Create two 1/1 white Spirit creature tokens with flying.

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

Fabricate 2 (When this creature enters, put two +1/+1 counters on it or create two 1/1 colorless Servo artifact creature tokens.)

When this creature enters, create a 0/1 white Goat creature token. Sacrifice another creature: Scry 1. Escape—{3}{B}{B}, Exile four other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.) This creature escapes with two +1/+1 counters on it.

Haste Whenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni. Sacrifice another creature: Yahenni gains indestructible until end of turn.

Whenever a creature you control enters, put a +1/+1 counter on each creature you control.

As this enchantment enters, choose Khans or Dragons. • Khans — At the beginning of combat on your turn, put two +1/+1 counters on target creature you control. • Dragons — At the beginning of combat on each opponent's turn, tap target creature that player controls.

Landfall — Whenever a land you control enters, choose one — • Create a 2/2 white Cat Beast creature token. • Put a +1/+1 counter on each creature you control. Those creatures gain vigilance until end of turn.

Choose any number of target creatures. Each of those creatures gains persist until end of turn. (When it 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.)

Prevent all combat damage that would be dealt to you this turn. For each 1 damage prevented this way, create a 2/1 white and black Inkling creature token with flying.