Otherworldly Dust Jackal

Traits

Life Bond. When you regain Hit Points from a level 1+ spell, the jackal regains the same number of Hit Points if you're within 5 feet of it.

Hunter's Bond. While the jackal's Hunter's Mark is active, its rider shares it: the rider also deals the spell's extra damage to the marked target, and both the jackal and the rider have Advantage on Wisdom (Perception) and Wisdom (Survival) checks made to find it.

Shared Ward. Requires a level 5+ spell. While riding the jackal, its rider also has Resistance to Fire damage.

Greater Ward. Requires a level 7+ spell. The jackal has Immunity to Fire damage rather than Resistance, and its rider shares that Immunity while riding the jackal.

Actions

Nipping Strike. Melee Attack Roll: Bonus equals its Dexterity modifier plus your Proficiency Bonus, reach 5 ft. Hit: 1d6 + its Dexterity modifier Piercing damage. The jackal can then move up to half its Speed without provoking Opportunity Attacks from the target.

Bonus Actions

Fire Step (1/Day). Requires a level 4+ spell. The jackal burrows into the ground in a burst of embers and erupts in an unoccupied space it can see within 40 feet of itself. Its rider comes along. Dexterity Saving Throw: DC 10 + the spell's level, each creature within 5 feet of the space the jackal left. Failure: A number of d6s equal to the spell's level Fire damage. Success: Half damage.

Spellcasting. The jackal casts Hunter's Mark, requiring no spell components and using your spellcasting ability. It casts the spell as if using a level 5 spell slot, and it concentrates on it. 1/day: Hunter's Mark