Havoc Sower

The activation cost is where the design lives: this body wants colorless mana specifically, the symbol that only certain lands and rocks produce, and that requirement is the whole reason it reads differently from a generic firebreather. A 3/3 for four mana that pumps +2/+1 per activation is unremarkable on rate; the interesting part is that it doubles as a colorless mana sink, a creature that turns the awkward, narrow-use from your Eldrazi-flavored lands into combat damage when you have nothing else to spend it on. That makes it a payoff for a manabase built around colorless sources rather than a card that slots into any black deck. The devoid line is the flavor and the function in one: a black-mana creature that is colorless for every other purpose, so it dodges color-based interaction and counts toward Eldrazi-matters effects while still being cast off Swamps. It is a piece built to reward a specific kind of deck, one already committed to producing colorless mana, rather than a card that asks the rest of the table to come to it.