Air Combo Plus is an ability available to Sora in Kingdom Hearts and Kingdom Hearts II.
It increases the maximum amount of attacks in the air by one, and allows such attacks as Aerial Spiral and Horizontal Slash to be executed in succession. Because the normal number of attacks in a combo (ground or aerial) is three, the Kingdom Hearts II Support Ability Air Combo Boost works well when used at the same time as Air Combo Plus. The reason for this is that since Air Combo Boost increases the damage of the finisher depending on the number of hits in the air combo, adding Air Combo Pluses will mean more hits in the combo, and therefore a more powerful finisher.
Leveling Master Form to levels four and six will add Air Combo Plus to Sora's abilities. The Star Seeker keyblade also has Air Combo Plus as the default ability. Sora has two additional Combo Plus and Air Combo Plus abilities in the Pride Lands.
Air Combo Plus costs one AP to equip.