Guardian of Vitu-Ghazi

Convoke turns a wide board into a discount engine, and this elemental sits at the defensive end of that idea: a 4/7 with vigilance whose printed eight is a ceiling, not a floor. Every creature you tap shaves a mana off the cost, generic or matching its color, so a token-flooded green-white board can land it several turns ahead of its mana value. The body is shaped less like a threat than like a wall that happens to swing back. Seven toughness bricks the ground, and vigilance means it never has to choose between holding the line and pressuring: it attacks and stays home in the same turn. That trio (cheap once the tokens chip in, hard to trade off in combat, never tapped out) lets it lean on a swarm twice over. The creatures pay for it, then it stands guard behind the creatures it bought itself with. As a top-end for a go-wide deck it does honest work, the sort of payoff that wants you already ahead on the board rather than one that digs you back into the game.