Sphinx of the Revelation

Lifegain payoffs usually spend their trigger the instant it fires: gain some life, draw a card, and the transaction closes. This one refuses to settle. Every point of life the deck accrues converts into a stored energy charge, and that reservoir sits untouched until you route colored mana and a tap through the draw activation. The result is a lifegain engine that pays out on your schedule rather than the game's: a single big lifelink swing or a turn of small incidental drains can bank a reserve you cash in for a fistful of cards later, and because the activation carries no sorcery-speed clause, you can hold the tap open and fire it in response to a threat, drawing into an answer exactly when it matters. Energy in this shell has no home requirement, either: it does not care where the life came from, so any lifegain source feeds the same meter, and the payoff scales with critical mass instead of a single named partner. The 4/5 flying body with lifelink closes the loop on its own, attacking to gain, charge, and outlive most of what a five-drop expects to die to. Stitching energy, a mechanic with a firmly red-green history, onto white-blue lifegain is the whole conceit, turning the throwaway life totals those decks pile up into a renewable draw reservoir rather than a stat that quietly stops mattering once you are out of burn range.