This article's content is accurate to the most recent public game version, 0.4.8d.
"[5 Turns] Lowers all enemies' MAT."
Cost: 8 MP
Source: Wendy - Starting skill.
Lovely Witch's Hex is a spell that applies two stages of MAT Down on all enemies.
With this spell's relatively low MP cost, it is very strong against magic based enemies even if there is only a single foe.
The following enemy can cast Lovely Witch's Hex: