Abyssal Ressurection. The Final form of the Abyssal Creation... as if bursting forth from the original form and molding the shape of an abomination. Gains increased Melee Attack, Movement Speed, and Defense but loses all sense of arcana.

Tail of Fright's Assault. The Abyssal Abomination will swing it's tail at any and all attackers in range.

Action Melee Attack. Melee Weapon Attack: +4 to hit, range 20 ft., ∞ target. Hit: 3d8 bludgeoning damage

Frightful Spear. The sharp fluid motion floating tail of the abomination will stab the heart of any attacker deemed as a threat.

Action Melee Attack. Melee Weapon Attack: +7 to hit, range 30 ft., 1 target. Hit: 1d20 piercing damage

Claws of the Monstrosity. The Abomination takes a swing with claws fully extended at a target.

Action Melee Attack. Melee Attack: +2 to hit, range 5 ft., 1 target. Hit: 1d8 

Two Weapon Fighting.

Abomination of Movement. Anytime a movement or attack is made against or near the Abyssal Abomination it senses this and reacts by instantaneously moving 5 ft. in that direction, at such a fast speed that the normal eye cannot see giving a DEEP and GNARLING sniff. 

Abomination of Sight. can see any and all projectiles in the truest sense of the word dodging it at such a fast speed looking as if it didn't move an inch.

Abominations frightening tail. If a melee attack is successfully dodged its tail grabs the attackers weapon and holds it place (the attacker must make a STR saving throw to successfully release said weapon from its tail).

Enter the description for how legendary actions work for your monster here.

Legendary Action Name (Costs # Actions). Enter the description for your legendary action.

Instantaneous Movement (Costs 0 Actions). Its fluid yet somehow unconnected wings pulse and push in the direction it wishes.

Abyssal Abominations Hunger (Costs 1 Action). Any living thing that it has dwindled to under 2 Hitpoints it can instantly devour gaining one random score permanently.