Elegy

From the Super Mario Wiki

Super Mario RPG Move
Elegy
Mastered By	Hobgoblin Reacher Axem Green
Type	Status
Attack Power	N/A
Effect	Causes Mute
Element	Neutral
Range	One enemy
Damage Halved by Amulet	N/A
Damage and Status Effect Negated	Yes

Elegy is a status attack used by certain monsters such as the Hobgoblin, and the Reacher in Super Mario RPG: Legend of the Seven Stars. It causes Mute on a singal party member. When Elegy is used, small, glowing music notes begin appearing and start floating on screen, and Mute symbols descending on the character, making them look lethargic and unable to use special moves.

The Music used in the move is the "Sadness" Song.