Aspect of the Orgull

Touching a willing creature (cannot be yourself), you channel the vile magic from the hells to wrap around your target and change them into a demonic ooze-like creature, named Orgull. This shape remains as long as you maintain Concentration and for the duration the target gains the following benefits;

Their size becomes Huge (9 ft), they gain 60 temporary HP and their strength and constitution are set to 22, but their intelligence, wisdom and charisma become 9. They also gain resistance to all non magical damage and immunity to all conditions except unconscious. Once per turn, when they make a melee attack, they may lash out their gelatinous arms to slam down, striking with a quake of the terrain in a radius of 10 ft, forcing any creature within range to roll a constitution saving throw (DC 15), the targets suffer 4d8 bludgeoning damage on a fail or half as much on a success. Whenever the Orgull takes the jump action, a 10 ft radius from where they land quakes, becoming Difficult Terrain for 1d4+1 turns. 

When you cast this spell and at the end of each of your turns for the duration, you may use your reaction to send a pulse of magic through the connection you share with the transformed ally to emit a wave of hellfire from them, 5 ft in every direction. Creatures within the burst take 2d4 fire damage, are knocked back 5 ft and gain the Prone condition, additionally its Concentration is broken if applicable.

If the Orgull's temporary HP depletes, they will let out an ear shattering screech and fall prone, gaining vulnerability to fire damage until they clean the ooze off their body.