Eventide

Switch target creature's power and toughness until end of turn. Draw a card.

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

{2}{R}, {T}, Put a -1/-1 counter on a creature you control: Hatchet Bully deals 2 damage to any target.

{T}: Target player exiles a card from their graveyard. Whenever you cast a black spell, you may untap Merrow Bonegnawer.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Wither (This deals damage to creatures in the form of -1/-1 counters.) Persist (When this creature dies, if it had no -1/-1 counters on it, return...

When Noggle Hedge-Mage enters the battlefield, if you control two or more Islands, you may tap two target permanents. When Noggle Hedge-Mage enters...

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, r...

Search target player's library for up to X cards, where X is the number of Swamps you control, and exile them. Then that player shuffles.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) Persist (When this creature dies, if it had no -1/-1 co...

{G/U}, Sacrifice Grazing Kelpie: Put target card from a graveyard on the bottom of its owner's library. Persist (When this creature dies, if it ha...

Lifelink Voracious Hatchling enters the battlefield with four -1/-1 counters on it. Whenever you cast a white spell, remove a -1/-1 counter from Vo...

{3}: Target green creature gets +1/+1 until end of turn.

{2}: Target black creature gains wither until end of turn. (It deals damage to creatures in the form of -1/-1 counters.)

{G/U}: Groundling Pouncer gets +1/+3 and gains flying until end of turn. Activate only once each turn and only if an opponent controls a creature w...

{U/R}: Stream Hopper gains flying until end of turn.

Whenever you cast a spell that's both blue and red, Riverfall Mimic has base power and toughness 3/3 until end of turn and can't be blocked this turn.

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

When Wistful Selkie enters the battlefield, draw a card.

Gain control of target creature until end of turn. Untap that creature. It gets +X/+0 and gains haste until end of turn.

Flying Wither (This deals damage to creatures in the form of -1/-1 counters.) Whenever Needle Specter deals combat damage to a player, that player ...

Chroma — Reveal the top ten cards of your library. For each blue mana symbol in the mana costs of the revealed cards, target opponent mills a card....

{T}: Add {C}. {R/W}, {T}: Add {R}{R}, {R}{W}, or {W}{W}.

Target creature gains double strike until end of turn. (It deals both first-strike and regular combat damage.)