Lurking Roper

A 4/5 for is aggressively costed, and the drawback is stranger than the usual "enters tapped" or "can't block" tax: this body simply refuses to untap on its own, so left alone it swings once and then stands there. The untap condition rewires the creature's clock around your lifegain engine. Every point of life you gain flips it back upright, which means its tempo is metered by how often your deck touches life totals rather than by the turn counter. That converts a passive drawback into an active build-around: a lifelink source, a Soul Warden effect, a repeatable drain trigger, and the 4/5 becomes an effectively vigilant attacker that keeps blocking on the turns you need it. The distinction matters, because the trigger keys specifically on gaining life, not on any change to your total; the life loss from a fetchland or a painland does nothing here, so the shell has to supply genuine incidental gain rather than mere life-total churn. Without any of that, it is a one-shot beater that overextends into a swing and then sits idle. The whole burden lands on the deckbuilder to supply the untap trigger, and the reward scales with how much lifegain is already doing other work in the list. It is a green body priced like it has no strings, with the strings hidden entirely in a support package (green plus a steady source of life gain) that has to be assembled on purpose.