Crackleburr

Change the text of target spell or permanent by replacing all instances of one color word with another. Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

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.

Trample Tap an untapped red creature you control other than this creature: This creature gets +X/+0 until end of turn, where X is the power of the creature tapped this way.

Enchant creature As long as enchanted creature is black, it gets +1/+1 and has deathtouch. (Any amount of damage it deals to a creature is enough to destroy that creature.) As long as enchanted creature is green, it gets +1/+1 and all creatures able to block it do so.

As this creature enters, choose an opponent. This creature enters with a -1/-1 counter on it for each creature that player controls.

Flying U: Target permanent becomes blue in addition to its other colors until end of turn.

Other blue creatures you control get +1/+1. Other red creatures you control get +1/+1. U/RU/RU/RU/R: You may put a blue or red creature card from your hand onto the battlefield.

Chroma — Reveal any number of cards in your hand. You gain 2 life for each green mana symbol in those cards' mana costs.