Mirrorwood Treefolk

A green creature that asks for red and white mana to do its only trick is a relic of the multicolor-block experiment that built mono-colored cards whose activated abilities reached outside their own color pie on purpose. The 2/4 body is reasonable green wall-stuff, but the ability is the curiosity: pay four mana split between two unrelated colors and the next damage headed for this Treefolk gets redirected to any target you choose. That turns a combat block into a redirect: point an attacker's swing back at a different creature, or shunt a burn spell aimed at the Treefolk onto your opponent's face. The redirect catches the next instance of damage that turn, so it works as a pre-combat insurance policy or a response to a burn spell on the stack, but it only saves the Treefolk once per activation. The off-color activation cost is the point, not an oversight: it reads as a deliberate reward for being deep in three colors at a time when block decks were straining their manabases to do exactly that. It is a small gear in a larger design project of seeing how far a creature's relevant text could drift from the mana symbol in its corner.