Bone Dragon, also known as Skelesaur, is an enemy in Final Fantasy V. It can be found at Drakenvale on the special fight for acquiring the Golem summon, and again as a random encounter, as well as encountered as one of the toad enemies that is fought alongside Alchymia.
In all instances it is fought, it will either use a physical attack or its special attack Bone, which reduces a target's HP to single digits. Even though it is an undead enemy, it cannot be instantly killed using Phoenix Downs or Raise, but non-resurrective curatives still harm them. They either appear in pairs or with other enemies.
An ideal way of dealing with these enemies is to use Bards and the Requiem song to inflict heavy damage quickly. Alternatively, one can use the Healing Staff or Cura, as well as Hi-Potions and physical attacks, to deal with them.