Chaos II

Amorphous.  This creature cannot have its form altered by any means. This creature can also fit through gaps sized 1 inch or bigger. 

Agents of Chaos. This creature can morph its limbs into any simple or martial weapon for its Multi-attack. It does this at the beginning of each of its turns.

Dimensional Horror. This creature is one of any and all dimensions of existence. Chaos II has immunity to non-magical damage and resistance to magical damage dealt by creatures that have never traveled to another world. This makes them susceptible to other-worldly travelers though. Chaos II has vulnerability to all types of damage dealt to them by creatures who have traveled to another world, or have been blessed by a deity from another world. 

Multi-attack. Chaos II can make 2 attacks in any order they want.

Action Melee Attack. Melee Weapon Attack: +6 to hit, reach 5/10 ft., # target. Hit:  2d8+3.

Action Ranged Attack. RangedWeapon Attack: +6 to hit, range #/# ft., # target. Hit: 2d8+3. 

Feed off chaos. Chaos II can gain 10 temporary hit points as a reaction to a hostile creature becoming frightened within 30 ft of Chaos II