Although it was not named nor an actual ability during gameplay, a similar attack was seen being used in the opening, where Emperor Mateus used it against Terra Branford. It also appeared in the story mode, where he used it against Firion and trapped him during their battle, with the explosion being powerful enough to temporarily stun Firion.
Dreary Cell is a magic HP attack for Emperor Mateus, learned at level 13 for the ground version and level 30 for the aerial version. Both requires 30 CP to equip (15 when mastered), 130 AP to master, has Unblockable priority, and has the Absorb effect. Mateus creates a spark of light in the ground that expands into a crest of energy and surrounds opponent with exploding mines when they come close enough.
Dreary Cell is an ability for Emperor Mateus. A variant of the ability was shown in the announcement trailer for Emperor Mateus, which was largely similar only instead of Emperor Mateus activating the trap directly, he remotely activated it via his scepter telekinetically placing a rune on the battlefield to cause the orbs to explode violently.
Dreary Cell is an ability for Emperor Mateus. When using the move, Emperor Mateus teleports upward as the screen turns dark. He then appears slightly above both the party and the enemy they are facing and proceeds to fire a sparkling energy ball towards the enemy in a wave. Then a massive purple rune appears and summons several orbs, which then closes in on the enemy, each contact dealing significant damage before causing a massive explosion as Mateus teleports back to the ground and rejoins the party, as well as leaving behind splash damage that gradually accumulates.