Artagus (Morgrimm's Avatar)

Shapechanger. Artagus can use its action to enter an astral form, gaining resistance to all damage types except psychic, radiant, and cosmic. Its AC increases to 18, and it gains the ability to fly with a speed of 60 feet. While in the astral form, Artagus can make ranged attacks with its Astral Claw Attack.

Keen Hearing and Smell. Artagus has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Shadow Regeneration. Artagus regains 20 hit points at the start of its turn. If it takes radiant damage, this regeneration is negated until the start of his next turn.

Magic Resistance: Artagus has advantage on saving throws against spells and other magical effects.

 Multiattack. Artagus makes three claw attacks on each turn, or one claw attack and one bite attack in Beast form.

Astral Claw Attack. Melee Weapon Attack: +12 to hit, reach 5 feet, one target. Hit: 15 (2d6 + 7) piercing damage.

Beast Bite Attack (Only in Beast Form). Melee Weapon Attack: +12 to hit, reach 5 feet, one target. Hit: 22 (3d10 + 7) piercing damage, and the target must succeed on a DC 18 Constitution saving throw or be paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on a success.