Arcanic Owlbear

Keen Sight and Smell. The owlbear has advantage on Wisdom (Perception) checks that rely on sight or smell.

Magic Immunity. The owlbear has full immunity against spells of 4th level or lower. If targeted with a magic missile, a line spell, or a spell that requires a ranged attack roll, roll a 1d6. On a 1 to 5, the Arcanic OwlBear is unaffected. On a 6, the Arcanic OwlBear is unaffected, and the effect is reflected back at the caster as though it originated from the owlbear, turning the caster into the target.

Arcane Siphon. The owlbear can spend a minute to consume the magical essence of an item, or ten minutes to siphon magical essence from a unconcious or dead creature. After the magical essence is consumed, the target is no longer magical/loses their ability to cast spells.  The Owlbear regains half its hitpoints when this is done, and doesn't need to eat for a week.

Multiattack. The owlbear makes two attacks: one with its beak and one with its claws.

Beak. Melee Weapon Attack: +7 to hit, reach 5 ft., one creature. Hit: 10 (1d10 + 5) piercing damage.

Claws. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) slashing damage.