Quote Originally Posted by metagloria View Post
Goannai (Ghost Ship, VII in the Battle Arena)
OH GOD THIS SO MUCH. I was stoked when I found out White Wind and Elixirs instantly kill the thing.

Other mentions:

Encircle (multiple enemies, V)
Dispelga (multiple enemies, XII)
Darkja (Zodiark, XII)
Fireworks (Almighty Shinra, X-2)