Creakwood Ghoul

A repeatable graveyard exile stapled to a 3/3 body, with the meaningful detail being the cost it charges: two hybrid black-or-green symbols per activation. The card itself wants to cast, so this is a black creature, not a green one. What the hybrid activation buys is fixing on the ability rather than the spell: a mono-black deck pays the exile cost as flat black, and a black-green deck can run the body off its black sources while leaning on green mana to fuel repeated activations. The activation is small (exile one card, gain one life) but unbounded, so the body doubles as a slow attrition engine that grinds a graveyard down to nothing across a long game while padding life a point at a time. That is the trade the design makes: no single activation matters, but the willingness to keep activating turns a fair midrange creature into a maindeck answer to anything that wants its graveyard back. The life gain is rounding, not a payoff; the exile is the function. The hybrid is doing structural work on the activation, smoothing the mana for a black or black-green deck that intends to use this repeatedly, not on the casting cost itself.