Sister Splinter

Sister Splinter is the leader of the Splinter Tribe, fought in Shellwood. She drops falling thorn-spikes that progressively shrink the safe arena and slides along the ceiling to slash down at you, then summons Splinterbark adds in her second phase. There is no item drop, but the win clears your route toward the Cling Grip wall-climb upgrade. Keeping mobile and clearing her summons quickly keeps the closing arena manageable.