Adept Watershaper

Indestructible is usually a defensive keyword, a way to shrug off wraths and combat blocks. Here it becomes an incentive to attack. The anthem covers only your other tapped creatures, so it rewards the exact posture that normally exposes an attacker to danger: swing wide, tap out, and the board that would otherwise fold to blockers and damage-based sweepers instead comes back whole. The tension is deliberate. A grant of permanent indestructibility to everything you control would turn combat math into nonsense; restricting it to tapped bodies means the shaper protects the aggressor, not the wall, and leaves your untapped creatures fully mortal so the ability never freezes the board into a stalemate. Note that the "other" clause excludes the shaper itself entirely: it is a 3/4 that hands out protection it never enjoys, tapped or not, which keeps it a real target rather than an untouchable engine. And indestructible answers nothing that skips the destroy step. Exile, sacrifice effects (including edicts, which force you to choose a creature to give up rather than destroying one), and toughness reduction all cut straight through it; even a body that survives combat is a body that tapped to attack and cannot block back. The design sits where a go-wide, tap-out attack plan already lives and converts the drawback of an all-in swing into its payoff.