Fire Crystal

The Fire Crystal is an enemy encountered in battle alongside the optional boss Culex in Super Mario RPG: Legend of the Seven Stars. Like Culex and the other crystals, it is from the dimension of Vanda and met in a portal leading to that world found in Monstro Town.

True to its name, the Fire Crystal uses largely fire-based attacks, including Corona, Flame, and Flame Wall. It rounds these attacks out with the moves Drain and Mega Drain.

It is weak against Ice-based attacks. It has greater Magic Defense than the next-in-line Water Crystal. Combined with its exceptional Magic Attack, it can be considered an even more difficult opponent than even the Earth Crystal.

Trivia

 * All four of the Crystals originally appeared in Final Fantasy and featured prominently in Final Fantasy IV, from which Culex's theme music comes.
 * Paper Mario, which was conceived as a sequel, has the Crystal Bits serving much the same purpose and appearance alongside the Crystal King.