Meltdown (Magic)

Meltdown is an ability, usually Fire-related.

Final Fantasy V
Meltdown is a Dark Art. It causes fire damage and Sap.

Final Fantasy VI
Meltdown (which was initially translated as Merton) does Fire damage to all targets.

Final Fantasy VIII
Meltdown does a small amount of damage and causes Vit 0.

Final Fantasy Tactics
Melt is a Dimension Magic spell usable by Hashmalum.

Final Fantasy Tactics Advance
Meltdown sacrifices the user to do Fire damage in an area equal to their HP. It is learned by Defenders.