Czar Dragon

The Czar Dragon is the boss of the Barrel Volcano and the guardian of the sixth Star Piece in Super Mario RPG: Legend of the Seven Stars. He is a fire dragon, and as such, is a master of fire magic. However, he also knows as substantial number of earth magic spells, which he uses to attack his enemies. The Czar Dragon also knows the attack Water Blast (which seems strange, since he is made of fire; however, for some reason, Water Blast is an earth magic attack, not a water magic attack). After Mario and his party defeat the Czar Dragon, the monster immediately returns from the grave as the menacing Zombone.

Zombone
Zombone is the skeletal counterpart and second form of the Czar Dragon. He is more powerful than the Czar Dragon. After a long battle, Mario and company completely eradicate the ghastly dragon.

Since Zombone is undead, he can be damaged by Pure Water. However, unlike other undead enemies, he will not be instantly defeated by the liquid.