Ancient Wolf Titan

Immutable Form. The golem is immune to any spell or effect that would alter its form.

Magic Resistance. The golem has advantage on saving throws against spells and other magical effects.

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

Mimicry. The titan can mimic simple sounds it has heard, such as a person whispering, a baby crying, or an animal chattering. A creature that hears the sounds can tell they are imitations with a successful DC 18 Wisdom (Insight) check.

Ancient Bond: The titan's magic can not be dispelled unless the oracle is slain 

Multiattack. The golem makes two attacks.

Slash. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 19 (3d8 + 6) slashing damage.

Bite. Melee Weapon Attack:  +10 to hit, reach 5 ft., one target. Hit: 19 (3d8 + 6) piercing damage. While in wolf form bite does (5d8 + 6)

Bellow (Costs 3 Actions). All creatures within 30 feet of the monster must make a DC (8+Con+Prof) Constitution saving throw as the monster erupts in noise. On a failed save, a creature takes 5 (2d4) thunder damage and is deafened for 1 minute. A deafened creature can repeat the save at the end of their turns, ending the effect on a success. On a successful save, it takes half damage.

Digest (Costs 2 Actions). If a creature is swallowed, the monster can begin to digest them. The swallowed creature must succeed on a DC (8+Con+Prof) or take 3 (1d6) bludgeoning damage and 3 (1d6) acid damage. On a successful save, they take half damage.

Furious Swipe (Costs 2 Actions). The monster gives itself advantage and makes one melee weapon attack.