Efflorescence

A pump spell that splits into two spells depending on a cost you did not pay with mana. The base mode is unremarkable growth, two counters at instant speed. The infusion upgrade is what the design is chasing: if you gained any life on the same turn, the counters arrive with trample and indestructible, turning a combat trick into a near-guaranteed connection and a board-wipe insurance policy at once. What makes this construction clever is where it places the tax. Most conditional spells gate their payoff behind a card type in hand, a spectacle-style attack requirement, or a graveyard threshold. This one gates it behind lifegain, a resource that green-white and green-black lifegain shells generate as a byproduct of doing what they already do. The timing window is the sharp part, though: the life must be gained on the exact turn you cast this, so the upgrade is not a passive condition a dedicated deck satisfies once and forgets. It is a sequencing puzzle every turn, asking the pilot to land an incidental drain, a lifelink hit, or a food crack before committing the counters. In a deck with no on-turn lifegain the infusion clause is simply dead, and the card reverts to its plain first line. That asymmetry is the whole idea: a modest counter spell to anyone not building around it, a resilient finisher to anyone who can hit the same-turn condition when it counts.