Mosstodon

A 5/3 for five with no evasion of its own would be a forgettable green beater, except the body and the ability point at the same threshold. This creature already clears the power-5 bar that its own activation cares about, so the trample-granting effect folds back onto itself: for one mana, it can push its damage past a chump blocker rather than have a 5-power swing soaked up by a 1/1. The activation also reaches outward to green's biggest creatures, the ones that routinely sit above five power and most want a way to make their excess damage spill over the blockers in front of them. The design is a quiet statement about green's preferred resource: rather than reward small, efficient bodies, it rewards going large, then hands those bulky things a discount way to keep their damage from being wasted in combat. The toughness of 3 is the cost that keeps the rate fair; this is a fragile thing that wants to attack, not a wall that sits back and turns its mana on. It reads as a piece of an early "matters of size" experiment, where raw power numbers became a trigger condition rather than just a combat stat, and a green creature that turns its own bulk into reach is the most natural place to test that idea.