Asaurus Rex

Brutal Critical. Asaurus Rex can roll two additional weapon damage die when determining the extra damage for a critical hit with a melee attack.

Magic weapons Attacks of Asaurus Rex are magical.

Infectious Fury(10/Day) Spirit within Asaurus Rex can curse his target with rabid fury. The target hit by attack must succeed on a DC 17 Wisdom saving throw or suffer one of the following effects (your choice):

• The target must use its reaction to make a melee attack against another creature of your choice that you can see.
• Target takes 7 (2d6) psychic damage.

Multiattack. Asaurus Rex makes three attacks, one with his Stomp, one with his tail, and one with his bite. 

Primal Roar (Recharge 5-6). Asaurus Rex roars, shaking everything around. Every creature within 40ft must make a DC 18 Con saving throw. On a failed save the creature takes 35[roll]10d6[/roll] thunder damage and instantly loses concentration on any spell they were holding. On a success the creature takes half damage. 

Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 19 (2d12 + 6) piercing damage.

Tail. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 15 (2d8 + 6) slashing damage.

Stomp. Each creature within 10 ft of Asaurus Rex must succeed on a Dexterity saving throw DC 17 or fall prone and take 11 (2d4 + 6) bludgeoning damage.

Mechanical Fix (2/Day). Spirit within Asaurus Rex can Heal it. It can only use this when below half health (150 hp). Asuarus Rex can heal itself 30 (5d8 + 7). 

The T- Rex can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The regains spent legendary actions at the start of its turn.

Tail (Costs 1 Action). Asaurus Rex makes one Tail attack.

Grappling hook(Costs 2 Actions) Asaurus Rex shoots a grappling hook at target up to 40 ft away. If target is huge or bigger Asaurus is pulled towards a target, otherwise target need to make DC 18 Str saving throw, being pulled to Asaurus on a failed save, taking 11(2d12) bludgeoning damage.

Shoulder Missiles (Costs 2 Action). Missiles pop up from the "shoulders" of the Battle Mech and fire 2d4 missiles that seek targets with a heat signature. Each missiles has a range of 240 ft, hits it's target automatically, and deals 1d6 fire damage and 1d6 piercing damage.