Gain an ability score in two areas due to two entities.

Merge 

Use an action to merge into a Colossal Gemini. Both Gemini need to be within 5ft of each other.

Colossal gains a temporary 10 Hit Points and +3 AC. Colossal has access to both Gemini’s inventories, spells and abilities. Also gain +2 to hit and damage. This form will last for 30 minutes and once the time is up they will be reverted back into their normal forms.

If the colossal’s HP is 0 the Gemini’s will be thrown 10 feet away from each other and be knocked prone. They will have 5 HP if they’ve been forced out of this form.

At 8th level the temporary hit point will be increased to 15, at 14th level 20 and 20th level 30

Morph 

Use an action to morph Gemini into a slightly altered form

(Light) Grow wings and gain the ability of flight. You are able to fly 60ft. While empowered with light you may fly an extra 15ft. 

(Dark) Sink into the ground to become a shadow along the ground. You cannot be hit by damage done above the surface but you cannot attack either. While empowered with darkness you can burrow an extra 15ft.

Timed Strike

While empowered your melee attacks do an extra 1d4 Radiant or Necrotic damage.