Bloody the Wolf

Keen Abilities The wolf has advantage on Wisdom (Perception) checks that rely on all abilities.

Tactics. The wolf has advantage on an attack roll against a creature if at least one of the wolf's allies is within 15 feet of the creature and the ally isn't incapacitated.

Camouflage. The wolf has advantage on Dexterity (Stealth) checks.

Change Shape. The dragon magically transforms into any creature that is Medium or Small, while retaining its game statistics (other than its size). This transformation ends if the dragon is reduced to 0 hit points or uses a bonus action to end it.

Psychic Step. The dragon magically teleports to an unoccupied space it can see within 60 feet of it.

Blessing of the Omens (Recharges after a Short or Long Rest). If Bloody would be reduced to 0 hit points, its current hit point total instead resets to their max hit points, gains half of it in thp, and it recharges its Cold Breath.

Bite. Melee Weapon Attack: +24 to hit, reach 5 ft., one target. Hit: 22 (4d8 + 10) piercing damage. If the target is a creature, it must succeed on a DC 14 Strength saving throw or be knocked prone.

Cold Breath (Recharge 3–6). The wolf exhales a blast of freezing wind in a 15-foot cone. Each creature in that area must make a DC 35 Dexterity saving throw, taking 55 (34d8) cold damage on a failed save, or half as much damage on a successful one.

Change Shape. The dragon magically transforms into any creature that is Medium or Small, while retaining its game statistics (other than its size). This transformation ends if the dragon is reduced to 0 hit points or uses a bonus action to end it.

Psychic Step. The dragon magically teleports to an unoccupied space it can see within 60 feet of it.

 Legendary Resistance (50/Day). If Bloody fails a saving throw, it can choose to succeed instead.

The wolf can take up to 12 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. He regains spent legendary actions at the start of its turn.

Attack. He makes one Claw or Tail attack.

Move. He doesn't provoke opportunity attacks.

Icy Steam (Costs 3 Actions).Until the start of the dragon turtle's next turn, whenever a creature starts its turn within 30 feet of him if not a ally, that creature must succeed on a DC 30 Constitution saving throw or take 60 (18d4) cold damage. 

Can spell cast at will up to 3rd level for druid, cleric, and wizard spells. Can cast up to 9th level spell slots but has 5 extra on top of the ones he already gets for each level.