Eventide

Destroy target nongreen creature. Its controller loses 3 life if you've cast another black spell this turn.

When this creature enters, put a -1/-1 counter on each creature.

Flying You have hexproof. (You can't be the target of spells or abilities your opponents control.)

Whenever this creature is dealt damage, it deals that much damage to any target.

Create a token that's a copy of target creature. Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

T: Add C. 4, T: Create a 0/1 white Goat creature token. T, Sacrifice X Goats: Add X mana of any one color. You gain X life.

Chroma — When this creature enters, create a 0/1 white Goat creature token for each white mana symbol in the mana costs of permanents you control.

Swampwalk, forestwalk (This creature can't be blocked as long as defending player controls a Swamp or a Forest.)

Wither (This deals damage to creatures in the form of -1/-1 counters.) Whenever this creature deals damage to a player, that player can't gain life for the rest of the game.

Protection from white and from black W/B: This creature gains flying until end of turn. W/B: This creature gains first strike until end of turn. W/BW/B: This creature gets +1/+0 until end of turn.

U/R: This creature gains flying until end of turn.

This creature enters with four -1/-1 counters on it. G/U: This creature gains shroud until end of turn. (It can't be the target of spells or abilities.) Whenever you cast a green spell, remove a -1/-1 counter from this creature. Whenever you cast a blue spell, remove a -1/-1 counter from this creature.

Flying W/BW/BW/B: Regenerate target creature.

G/UG/U: Target creature you control becomes the color or colors of your choice until end of turn.

Target player loses 2 life and you gain 2 life. Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Target opponent reveals their hand. You choose a green or white creature card from it. You gain life equal to that creature card's toughness, then that player discards that card.

Cast this spell only if you've cast another green spell this turn. Trample

Flying U/R: This creature gets +1/-1 until end of turn.

Haste This creature has trample as long as it has a -1/-1 counter on 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.)

When this creature enters, you may return up to two target land cards from your graveyard to your hand.

Flash 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.)

T: Add C. B/G, T: Add BB, BG, or GG.

Wither (This deals damage to creatures in the form of -1/-1 counters.) 1G: This creature gets +2/+2 until end of turn. Activate only once each turn.

Chroma — Umbra Stalker's power and toughness are each equal to the number of black mana symbols in the mana costs of cards in your graveyard.