Wistful Selkie

Replacing itself the turn it lands, this 2/2 asks almost nothing of you in exchange for the card it draws: a body that trades or chips in, plus a fresh card off the top, all for three mana. Plain enough on its face, until you read the cost. Three pips that each accept either green or blue is what lets the creature slot into a mono-green list, a mono-blue list, or anything between, without ever demanding both colors in the same turn. That is the structural trick: a cantrip creature with a wider manabase reach than a fixed version could ever claim, a slot you can commit to before you know which of your two colors your draws will actually lean on. The Merfolk Wizard line adds two tribal hooks for the decks that care, but the durable identity is the flexibility, not the typing. The cost of that reach is power: a vanilla-adjacent 2/2 with one card attached is never going to swing a board. Consistency is the trade. Whatever side of the gold border your deck settles on, the creature does its small job the turn it arrives, and you are no worse for having spent the slot.