Banshee

Banshee/23|Level 23 Banshee/34|Level 34 Banshee/45|Level 45

Effect
When it attacks, the second hit damages your MP instead of damaging your HP (or your SP if you're low on MP) (or your HP if you're low on SP and MP).

Also see
Tenuous Banshee, Insubstantial Banshee, Immaterial Banshee, Wispy Banshee, Incorporeal Banshee, Ethereal Banshee, Spirited Banshee