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Rhyslash can withstand any sword and is able to drill through diamond, let alone any shield or armor.

It sharpens its drill to prepare for combat with a fellow Rhyslash. In a real confrontation, however, the Rhyslash with a smaller drill will usually flee.

Apparently, it can detect the innate qualities of leadership. It puts rocks in holes in its palms and uses its muscles to shoot them.