Hidon

The Hidon is a boss in the game Final Fantasy VI. It is a monster that was hunted by Strago and Gungho while they were in their youth, however, they were never able to defeat it. It reappears after being defeated during the plotline, giving you another chance to fight it and learn Grand Delta.

Strategy
Hidon is flanked by four Erebus. These enemies use various status attacks on the party, and they each have different weaknesses and strengths. If one in the party is to die during this part, Hidon will use Crypt Dust on the dead party member, turning it into a Zombie, so Ribbons and Amulets are useful in this battle. It can also cast Bio, so Star Pendants and Fairy Rings are useful as well. Once all the Erebus are defeated, Hidon uses the lethal Grand Delta, which is Strago's most powerful ability. Make sure he learns it!

Like other undead monsters, he can be defeated simply by using a Phoenix Down or any other revival spell on him.

Etymology
According to Strago, Hidon's name comes from the word "Hidden", an allusion to how difficult it was to find him.