Lifestream's Blessing

Green's card draw has always paid in creatures: the color that cannot dig with cantrips instead reads its board and refunds you in proportion to what you've committed. Here the meter is the single largest power you control, not a sum, which quietly rewards decks building toward one enormous body rather than a wide swarm. Instant speed sharpens that measurement: X is counted at the exact moment you cast, so you can wait until after combat resolves or after a pump spell lands and cash in a number you manufactured a phase earlier. It reads your board at its peak, then converts that peak into cards. The doubled life gain rides on a separate condition entirely, whether the spell was cast from exile, and that is where the two halves of the card open up. Foretell is the obvious route: banking it face down for a discounted cast a turn later both smooths the mana and satisfies the from-exile clause, so you draw and stabilize in one motion. But foretell is not the only door. Anything that casts from exile qualifies, so a cascade or impulse-draw effect that flips this spell out of hiding hands you the same life swing without your having planned the exile line at all. The card leans into green's identity as the color that gets paid for going big; the from-exile bonus rewards whichever way you happened to launder it out of your hand first.