Magic Burst

Magic Burst is an extremely powerful spell from Dragon Quest (series). It does a lot of damage to enemies and requires all of a character's MP.

Dragon Quest VI: Realms of Revelation
The spell is aquired by Ashlynn after in Sorceria through a story sequence. In the DS version, Mercury learns this spell at level 7. Any character can learn it by advancing to rank 6 of the Liquid Metal Slime class.