Glory-Bound Initiate

Two mana buys a 3/1 body, a fragile aggressive rate that dies to almost any block. The exert clause converts that fragility into a recurring decision: swing without exerting and it stays a glass cannon, or exert as it attacks and it becomes a 4/4 with lifelink for the combat, surviving trades a 3/1 loses and banking life on the way through. The cost is deferred, not paid up front. An exerted creature skips its next untap step, so what you spend is tomorrow's tap, not today's mana. That timing is the whole balancing act. It gates the upside behind a tempo tax rather than a resource cost, which forces you to read each combat fresh: is the toughness bump and the life gained worth surrendering a block or a counterswing next turn? The lifelink is what reframes the creature in a damage race. A pump spell adds to your clock; lifelink stretches the gap in both directions at once, so a turn that should have traded even can tilt several life points your way. This sits in a lineage of white beaters whose ceiling is unlocked by spending a future untap: creatures that ask you to mortgage board presence for a burst now, and reward players willing to sequence around the skipped turn instead of exerting on reflex.