When Guildpact Greenwalker enters the battlefield, you may choose a creature card in your hand. If you do, that card perpetually incorporates (Incorporate perpetually adds an additional casting cost to that card, adding any new colors from that cost, and adds abilities/text to that card for the rest of the game.) and gets +4/+4.
Multicolored creatures you control have ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .).
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