Feat: Heart of the Kaiju

Witnessing the might of the kaiju King Mogaru, Alru, and Toraloa up close awoke a new ferocity within you. When you transform using Monstrosity Shape, you can take on a kaiju form. When you take this feat, choose acid, cold, electricity, fire, or sonic damage; this is the damage your breath weapon deals. You can't change this later. The battle form is Gargantuan size with the following specific abilities; the damage values already include the extra die from being a 9th-rank spell.

Kaiju Speed 40 feet; physical resistance 5;

Melee 1 jaws (reach 20 feet), Damage 3d12+20 piercing;

Melee 1 claws (agile, reach 20 feet), Damage 3d8+20 slashing;

Breath Weapon 2 (evocation, primal) Each creature in a 60-foot cone takes 15d6 @item.flags.system.rulesSelections.damageType damage (of your chosen damage type), with a Basic Reflex save against your spell DC. Once activated, your breath weapon can't be used again for 1d4 rounds.