Apex Aspect:

Upon reaching 25% hp, Apex Predator will gain a 2.5x damage multiplier to all attacks.

Flamethrower:

Apex Predator uses its flamethrower hand to set creatures ablaze in a 120 foot cone. Any creatures in the affected area must make a DC24 Dex save or take 30d6 fire damage. If a creature succeeds the Dex save, they take half damage. 

Quad Rockets:

Apex Predator uses its quad rocket launcher to fire 8 rockets. This attack can target multiple creatures, with each rocket doing 2d12 fire damage. If this attack hits one creature, they will take 16d12 damage. Two, 8d12 each, etc. This attack also has infinite range. (+15 to hit)

Apex Slam:

Apex Predator slams its rocket launcher on a creature within 30 feet. The targeted creature will take 10d10 bludgeoning damage. (+18to hit)

Core Detonation:

Upon reaching 0hp, Apex Predator will run up to a random creature, grasp it firmly, and detonate its core next to it after ripping the core out, ignoring armor class. The target must make a DC24 Dex save. Upon succeeding, they will be left with 1 hp. Upon failure,  the target will be killed instantly and must make death saving throws until they succeed or another creature revives them.

Generate Shield: (costs 2 actions)

Apex Predator creates a shield around itself. The shield has 25% of its max hp and is separate from its regular hp.

Eye Beam:

Apex Predator shoots a massive laser beam from its eye, with a range of 200ft. The target of the attack will take 40d8 radiant damage. (Costs 2 actions)