The morningstar is an item first seen in the Polluted waterway, it is a mace with a spiked ball on the end.

It can be used to activate switches that are rusted over, and to flip over enemies trapped in it's shockwave. It can also be used as a two-handed weapon, though this may be ineffecient as Link cannot block.

It is obtained in the polluted waterway after fighting the Slime Eye miniboss.