In Kingdom Hearts III, Burst of Energy is an action ability exclusive to Hercules. It costs 3 AP to equip and 15 MP to use. When activated, the user charges up and then releases a shockwave of energy in all directions around themselves, damaging any enemies caught in the shockwave. The user is invincible while using this ability. Any enemies nearby the user during the charging will be drawn in and unable to attack.
Learning Burst of Energy
Kingdom Hearts III
Hercules uses a similar technique to Burst of Energy during his battle with Sora in the Hercules Cup.