Oketra the True

The God cycle that introduced this design sold indestructible bodies at aggressive rates, then taxed them with an attack-or-block condition that effectively turns the creature off until the board is built. Here the condition is three other creatures, and the activated ability exists precisely to meet it: each token is a 1/1 Warrior with vigilance, so a few activations both satisfy the gate and supply attackers that stay back on defense. That loop is the whole engine. A 3/6 with double strike that survives nearly everything is a fine threat, but it asks you to earn the swing by committing to a wide white board, which is the same thing the activation produces. The indestructibility does the heavy lifting on defense: a 3/6 that cannot be killed by combat or most removal is a wall that walks, and the moment the third creature lands it converts into a double-striking finisher that connects for six. The vigilance on the tokens is the quiet piece, letting a go-wide deck keep developing offense without surrendering blockers. White rarely gets a recurring token generator stapled to an unkillable body, and this fuses the two: a resilient mana sink that funds its own attack condition. The tension between the gate and the engine is the design, and it rewards exactly the kind of patient, board-building white deck the activation was built to feed.