From the Super Mario Wiki
Hobgoblins are undead enemies that inhabit Kero Sewers in the game Super Mario RPG: Legend of the Seven Stars. They wear ragged clothing and carry lanterns, making them resemble the Lantern Ghosts from Super Mario World 2: Yoshi's Island. Hobgoblins also slightly resemble Scarecrows. These enemies never fight by themselves; they always accompany other enemies like Rat Funks, The Big Boo or Shadow.
In battle, Hobgoblins attack by clawing their opponents. Additionally, Hobgoblins can use a number of magic spells that cause status ailments. One such attack is Dark Claw, which Poisons one of Mario's allies and causes 50% more damage than their normal claw attack. The other is Elegy, which Silences a party member, making them unable to perform special attacks. Since they are undead, Hobgoblins can be instantly destroyed with Pure Water.
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