Apothecary Geist

The conditional lifegain here is the whole point of the build: a 2/3 flier with no rider is filler, but slotted into a deck that already fields Spirits, the enters-the-battlefield trigger turns each copy into a three-life cushion stapled to an evasive body. That conditional is the load-bearing piece. The "if you control another Spirit" clause keeps the payoff anchored to the tribal commitment rather than handing it to any white deck that runs the card; you do not get the life unless you have already paid into the archetype, which is exactly how you reward a player for staying on-plan without overpaying generic decks. White's tribal-Spirit shells have always wanted bodies that flap over the ground and incidentally drag the race in their favor, and the geist does both jobs at common-adjacent simplicity: evasion plus a swing on the life total that compounds across multiples. It is the kind of card that does nothing remarkable in isolation and a great deal when it is the third or fourth Spirit to land, which is the precise design lever a tribe needs to make critical mass feel earned rather than automatic.