March of the Multitudes

Convoke and an X spell look like they should cancel out on paper: convoke wants creatures on the board, X wants mana to spend, and tapping your existing army to fuel a spell that makes more of it feels like robbing one line to pay another. This resolves that tension by treating a wide board as a discount. Every creature you tap is a body you no longer need untapped, and the tokens it produces arrive with lifelink to backfill the defense you just spent. So a go-wide deck that has stalled can hold up a fistful of lands, wait for end of step, and roughly double its width for almost no actual mana. The lifelink is what elevates it above a generic token spell: a flash of soldiers at the end of a turn is a swing in the race even if none of them ever connect, and a single attack with the resulting board can gain enough life to unwind an aggressive opponent's whole clock. It scales with the position it is cast into rather than paying out a fixed number, so it demands an army before it hands you one. There is no buyback here and no loop: a single instant whose ceiling is set entirely by how crowded the board already was.