Heretic's Tongue. As a bonus action, the caster can control the movement and actions of the abomination, but cannot see through its eyes.

Reactive Protector. The abomination can take one reaction on every turn in combat.

Defensive Maneuvers. The abomination can carry its caster and fly at half its total speed (as if grappled). Whilst airborne with the caster, any attack rolls made against it is rolled at disadvantage.

Innate Spellcasting. The abomination's spellcasting ability is Wisdom (spell save DC 10). The abomination can innately cast the following cantrips, requiring no material components:

At will: fire bolt, sacred flame, spare the dying

Multiattack. The abomination can make one fist attack and cast one cantrip.

Offensive Maneuver. If the abomination is flying and dives at least 30 feet straight toward a target and then hits it with a melee weapon attack, the target is knocked prone.

Fist. Melee Weapon Attack: +5 to hit, reach 5ft., one target. Hit:  6 (1d6 + 3) bludgeoning damage.

Savior.  When an attacker the caster can see targets them, the abomination can use its reaction to move to the caster's position, becoming the target of the attack instead.