Sonic Boom is an ability exclusive to the Gaia command. It reduces an enemy's HP by 1/4 of its total HP, and can be used in plains, towers, the Void, Castle Exdeath, Pyramid of Moore, Interdimensional Rift, Ship Graveyard, and Library of the Ancients.
Sonic Boom is an ability in Mog's Dance command, and is usable after learning Earth Blues; Gau can also use Sonic Boom with the Satellite Rage. It reduces one enemy's HP by 37.5% of its max HP, inflicts Sap and is unblockable, but fails on targets immune to Death. An enemy attack with a similar graphic, Shamshir, halves the target's HP.
Sonic Boom is an enemy ability used by Bat Trios. It reduces the attack rating of any players in range.
Sonic Boom is an ability of the Hunter class, which is learned from Cranequin for 200 AP. It inflicts non-elemental damage to all enemies in range.
Sonic Boom is once again an ability of the Hunter class, learned for 200 AP from the Cranequin.
A sonic boom is the sound associated with the shockwaves created by an object traveling through the air faster than the speed of sound.