Target creature you control gets +1/+0 until end of turn if you've cast another instant or sorcery spell this turn. Then it deals damage equal to its power to up to one target creature an opponent controls.

When this creature enters, you may discard a card. If you do, draw a card.
, Exile a card from your graveyard: Add . When you do, this creature deals 1 damage to each opponent.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
When this creature enters, put a +1/+1 counter on each of up to two other target creatures you control.

Put two +1/+1 counters on target creature.
Infusion — If you gained life this turn, that creature also gains trample and indestructible until end of turn.

Flying
When this creature enters, draw a card.

Equipped creature gets +0/+1.
As long as equipped creature's toughness is greater than its power, it assigns combat damage equal to its toughness rather than its power.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Infusion — When this creature enters, target creature an opponent controls gets -4/-4 until end of turn if you gained life this turn.

As an additional cost to cast this spell, behold a Kithkin or pay . (To behold a Kithkin, choose a Kithkin you control or reveal a Kithkin card from your hand.)
Whenever another creature you control enters, this creature gets +1/+1 until end of turn.

, Sacrifice this creature: Destroy target artifact or enchantment.

Choose one or both —
• Target creature gets -1/-1 until end of turn.
• Put a +1/+1 counter on target creature.

Whenever this creature enters or attacks, you may blight 2. If you do, you draw a card and lose 1 life. (To blight 2, put two -1/-1 counters on a creature you control.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Return one or two target nonland permanents to their owners' hands. Then if you control a Merfolk, create a 1/1 white and blue Merfolk creature token for each permanent returned to its owner's hand this way.

, Exile a creature card from your graveyard: Create a 1/1 green Saproling creature token.
Sacrifice two Saprolings: You gain 2 life and draw a card.

This creature enters tapped.
Whenever this creature attacks, you may pay . If you do, return target creature card from your graveyard to your hand.

: Add .
, Pay 1 life: Add .
, , Sacrifice a Desert: Target player mills four cards. (They put the top four cards of their library into their graveyard.)

When this creature enters, create a 0/1 black Wizard creature token with "Whenever you cast a noncreature spell, this token deals 1 damage to each opponent."

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

When Koh enters, exile up to one other target creature.
Whenever another nontoken creature dies, you may exile it.
Pay 1 life: Choose a creature card exiled with Koh.
Koh has all activated and triggered abilities of the last chosen card.

Target creature gets -3/-3 until end of turn. Target player mills three cards. (They put the top three cards of their library into their graveyard.)