Announced back in August as a brand new fighter for Final Fantasy Dissidia Arcade, Square Enix and Koei Temco have released an extended trailer showing Ace in action. He throws out magic cards for his basic attacks, either as normal projectiles or slow moving orbs which track enemies in motion. Ace’s main mechanic is queuing up certain colored cards–grey, red, blue or yellow–and then expending them all at once to cast a specific spell.
Throughout the trailer, you can see this happen; near the start, Ace expends three grey cards and one red card to cast Stop on an enemy Onion Knight, while he later uses three yellows and a red to cast some kind of buff to all of his team mates within a certain area. He also has some kind of warp strike ability, which seems to use up a grey card charge based on the grey explosion that happens when he exits the warp. Ace looks like an effective support/ranged attacker who can deal damage from afar, buff friendly fighters while debuffing opponents to lead into large team attacks.
Ace is set to be added to Final Fantasy Dissidia Arcade in an update on the 28th of September so expect more information on this card-wielding fighter very soon.
Source: Square Enix Channel