Wave Cannon is a skill that appears exclusively in Dragon Quest Tact modeled after the enemy-only attack of the same name from the Final Fantasy series. It is one of Omega's signature skills, firing a massive and destructive particle beam at any and all foes in front of it.
Wave Cannon can be learned by Omega at level 54 and costs 125 MP to use. It inflicts major typeless martial damage to all enemies in a long fan-shaped area in front of it and can occasionally lower their Martial Res too. Upgrading the skill raises its damage and lowers the amount of MP it costs to use.
- Wave Cannon's page on the Final Fantasy Wiki