Essence Depleter

A drain engine keyed entirely to the colorless mana the Eldrazi resource axis was built around. The value lives not in an unremarkable creature but in the activated ability, which converts surplus mana into incremental reach: each activation costs (two mana, one of it strictly colorless) for a two-point life swing, repeatable as long as you can keep paying. That is the slow inevitability that makes ground stalls irrelevant; left alone, it closes games a tick at a time with no attack step required. The instructive part is how tightly the math is fenced in by its own ecosystem. The in the cost cannot be covered by ordinary colored or generic mana, so the engine is only as live as the colorless-producing lands and rocks around it. Strip that base away and the drain is dead text on a middling attacker. The dependency is deliberate: this is a payoff for committing to the colorless subtheme rather than a generically splashable value body, and it rewards a mana base most decks are never asked to assemble. Devoid carries the design through to the battlefield, leaving the card colorless in play so it sits under color-hosed removal and slots into the wider Eldrazi shell without diluting it. An attrition piece for a deck willing to bend its lands toward , and inert anywhere that isn't.