Carbuncle

Carbuncle, On the tenth floor, skull tiles cover the room. If the party steps onto the northernmost one, they will teleport to an inaccessible spot where Carbuncle is. There is a flight of stairs below if you and the party does not want to fight him. Defeating him wins Carbuncle, a Level 4 Summon. It is recommended to fight him, because after defeating Exdeath in the castle, you and the party cannot come back to fight him again. Carbuncle has two forms, an offensive form and a healing form, which share HP but not status conditions. The offensive form has permanently active float and reflect status effects. It never strikes physically and attacks only by reflecting magic off itself. The offensive form consists of three phases, which change once its HP falls below certain thresholds. Its first phase casts the second-tier elemental Black Magic spells, Fira, Blizzara, and Thundara. When its HP falls below 10,000, it switches to casting Bio, Confuse, and Stop.