Ragnarok

After you have gained the esper Ragnarok, (spoiler: assuming you chose to have it in its esper form and not its sword form) you can cast the esper as a powerful magic spell attack in battle just like you can with any esper. This esper is unique however because when you cast it on certain monsters they turn into an item which you get to keep. The chart for this is as follows.

Enemy	Outcome
Balloon	Flame Shield
Barb-E	Ribbon
Bomb	Flame Shield
Borras	Ogre Nix
Chaser	Mithril Mail
Covert	Trump
Cruller	Elixer
Dahling	Ribbon
Hades Gigas	Ogre Nix
Harpy	Exp Egg
Heavy Armor	Heavy Shield, Mithril Blade
Intangir	Megalixer
Lvl 80 Magic	Ribbon
Lvl 90 Magic	Ribbon
M-Tek Armor	Mithril Helmet/Sheild/Blade, Heavy Sheild
Mag Roader	Gold Lance/Shield, Mithril Mail
Ninja	Assassain Dagger
Pipsqueak	Mithril Helmet/Blade
Protoarmor	Crystal Armor, Crystal Sheild
Rhyos	Ice Sheild
Rider	Gold Helmet/Lance
Sir Behemoth	Thornlet, Cursed Ring, Relic Ring
Spektor	Tintinabar
Spit Fire	Gold Helmet
Tapdancer	Marvel Shoes
Wooly	Safety Bit
Enemy	Outcome