Blink Hound

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

Pack Tactics. The hound has advantage on an attack roll against a creature if at least one of the hound's allies is within 5 feet of the creature and the ally isn't incapacitated.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 15 (2d8 + 5) piercing damage plus 7 (2d6) fire damage.

Fire Breath (Recharge 5–6). The hound exhales fire in a 15-foot cone. Each creature in that area must make a DC 12 Dexterity saving throw, taking 21 (6d6) fire damage on a failed save, or half as much damage on a successful one.

Teleport (Recharge 4–6). The dog magically teleports, along with any equipment it is wearing or carrying, up to 50 feet to an unoccupied space it can see. Before or after teleporting, the dog can make one bite attack. When the hound appears, any being within a 5 foot radius must succeed a DC 15 DEX Save or take 1d4 fire damage.