Gelatinous Genesis

The doubled X is the whole engine here: each point of X you buy raises both the number of tokens and the size of every one of them, so the board you get back scales quadratically (X tokens that are each X/X is X-squared total stats) while the cost climbs only linearly at 2X plus one green. That asymmetry is why this lives in the lategame rather than the curve-out: at three or four X it is a fine board, but the curve only opens up once you have flooded into double-digit mana, where a single resolution can hand you a dozen 12/12s off twenty-five mana. Green has always had X-spell finishers, but most of them dump one oversized threat or a flat squad of identical small bodies; the cost is what lets one cast deliver both width and height at once, scaling along two axes from a single spell. The width is also its insulation: spot removal trades one card for one Ooze and barely dents the swing, which is the opposite of how a lone fattie folds to a single Murder. The real soft spot is the board wipe, since the entire investment sits on one creature type with no built-in protection. The Ooze typing is incidental rather than a tribal payoff; the work this fills is the mana-flush green deck that has more lands than spells and needs one card to convert that surplus into a closing presence.