Aether, Steward of The Forest

Reforestation — {g}, {t}: Place a seed counter on target land. It's a Forest in addition to its other types as long as it has a seed counter on it.

Tick Naysh — Whenever a player casts a spell or activates an ability, amass Elk X, where X is the amount of {g} spent to cast or activate it. If you control an Elk with power 10 or greater, you may exile Aether, then return him to the battlefield transformed under his owner's control.

"Goodbye, and goodnight... Bang!"