He is the ruler and creator of the dreamworld known as Dynamis.
Limit Break (Su)
At 1st level, Diablos receives the Limit Break (Black Hole).
Black Hole (Su): Diablos conjures a black hole of dark energy, blasting his foes. Enemies within 30 feet of the avatar take 1d6 points of shadow damage per summoner level, with a Reflex save (DC 10 + half of the summoner’s level + Diablos’s Constitution modifier) for half damage.
Dark II (Sp)
At 3rd level, Diablos is able to cast Dark II like the spell. This is a spell-like ability and consumes 2 MP from the summoner.
Shadow Strike (Ex)
At 6th level, as a standard action, Diablos can make a slam attack by striking a shadow adjacent to him and hitting a foe up to 30 feet away. It has a -5 penalty on the attack roll with this ability but the foe is considered flat-footed against the attack.
Pit of Despair (Su)
At 9th level, Diablos creates a blast of dark energy against a single foe. The target of this ability suffers the effects of Gravity, as the black magic spell. This is a spell-like ability that consumes 5 MP from the summoner. Blue mages may learn this ability as a 5th level spell (Knowledge: Planes DC 25).
At 12th level, Diablos whispers words of taint and corruption to one foe up to 30 feet away. The subject must make a Will save (DC 10 + half of the summoner’s level + Diablos’s Charisma modifier) or be inflicted with Confuse status. This is a spell-like ability that consumes 6 MP from the summoner. (Blue mages may learn this ability as a 6th level spell (Knowledge: Planes DC 27).
At 15th level, Diablos is able to cast Darkga like the spell. This is a spell-like ability and consumes 5 MP from the summoner.
Demonic Crush (Ex)
At 18th level, Diablos can attempt a ranged touch attack roll against a target within 30 feet. If the attack is successful, the target takes 5d6 points of shadow damage.