Kumano, Master Yamabushi
A repeatable one-damage source for two mana is unremarkable; the rider is what reshapes it. Any creature this Shaman has damaged this turn gets exiled instead of dying, and the operative word is "die": the replacement only fires when the creature would actually reach the graveyard. Effects that prevent the death event outright, regeneration and shield counters, sidestep the clause entirely, because the creature never "would die" in the first place; high toughness just keeps the target alive the ordinary way. Where the exile bites is the back end of death: the recursion that assumes a creature has already hit the bin. Persist, undying, and graveyard-return tricks all depend on the yard as a waypoint, and exile severs that pathway. The bookkeeping resets in cleanup, so the chip of damage and the lethal blow have to land in the same turn for the rider to apply. Inside that window, this becomes a clean answer to anything that ordinarily claws its way back. That is the part out of step with red's usual removal grammar, which is one big burst of damage delivered at once; here the design rewards spreading the kill across a turn and sealing the death-loop escape hatches before the final point lands. The 4/4 body for five mana is the fair frame around a recursion-denying removal engine that happens to swing.
