Determination of the Antigonids (Mythic Trait: Recharges after a Short or Long Rest). If Commander Aipsus is reduced to 0 hitpoints, and it is within either the physical or auditory presence of its fellow Antigonids, it doesn't die. Instead, it regains 8d12 hitpoints. The cambion loses the Battle Command attack option, and instead gains one more attack with its greatsword, which is empowered by an additional 3d6 fire damage.
Fiendish Blessing. The AC of the cambion includes its Charisma bonus.
Innate Spellcasting. The cambion’s spellcasting ability is Charisma (spell save DC 14). The cambion can innately cast the following spells, requiring no material components:
3/day each: alter self, command, detect magic
1/day: plane shift (self only)
Action Surge. Once per encounter, the cambion can take one additional action on their turn.
Fighting Style. The cambion a fighting style specialty.
Defense. While the cambion is wearing armor, it gains a +1 bonus to AC.
Multiattack. Commander Aipsus makes three melee attacks with its greatsword. In addition, the cambion issues one Battle Command if it is accompanied by at least one devil that it summons.
Greatsword. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 15 (2d6+8) slashing damage, plus 9 (3d6) fire damage.
Battle Command. If Commander Aipsus is accompanied by at least one devil that it summons, it can issue the following actions to said devils. The devils then use their reaction to immediately cause the detailed effects.
Converge. Up to three devils that Commander Aipsus summons use 5ft. of their movement to move closer to a target that the cambion marks, then makes one melee or ranged attack based on what the devil is currently wielding.
Pincer. All devils that Commander Aipsus summons use their full movement to move in such a way that they are between any enemies they are currently fighting.
Commander Aipsus can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. The cambion regains spent legendary actions at the start of its turn.
Battle Command. If Commander Aipsus is accompanied by at least one devil that it summons, it can issue the following actions to said devils. The devils then use their reaction to immediately cause the detailed effects.
Volley. All devils that Commander Aipsus summons make one melee or ranged attack against their enemies based on what the devil is currently wielding.
Strategic Redeployment. All devils that Commander Aipsus summons moves their full movement away from the danger of their enemies.
If Commander Aipsus' Mythic trait is active, it can use the options below as legendary actions.
Gungrave (Costs 3 Actions). Commander Aipsus empowers itself, gaining the dexterity and positioning of its entire retinue of devils. For 1 minute, the movement speed of the cambion is doubled, and the devil does not provoke attacks of opportunity.
Disciplined Bladework. Commander Aipsus makes 2 attacks with its greatsword.