Elixir Field misnamed.

[dinnertime]

snip.

You don't have to take the name literally.

Ah, I see. So let's call Fire I "Field of Death" because if you use it a lot on many enemies, you create a field of death with it.
Also, let's rename "Esuna" to "Aphrodisiac", because your group will love you if you use it properly.

Those sound so lame. Nice try though.

EDIT: Fire and Esuna have been recurring name spells in previous Final Fantasies while the abilities like Invincible, Defender and Destroyer I'll assume have been in XI only. Naturally, It would be awful to rename both Fire and Esuna.