'Crowned Tyrant'

Siege Monster. You deal double damage to objects and structures.

Keen Hearing and Smell. The 'Crowned Tyrant' has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Rampage. When the 'Crowned Tyrant" reduces a creature to 0 hit points with a melee attack on its turn, the 'Crowned Tyrant" can take a bonus action to move up to half its speed and make a bite attack.

Multiattack. You make 2 Claw Swipe Attacks, one of which can be replaced by the Bite Attack or the Slam Attack. 

BIte. Melee Weapon Attack: + attack bonus to hit, reach 5 ft., 1 target. Hit: 21 (3d6 + 6 + PB) [piercing] damage. The target is grappled(escape DC 16). A creature grappled in this way suffers your bite damage at the start of your turn.

Claw Swipe. Melee Weapon Attack: + attack bonus to hit, reach 10 ft., 1 target. Hit: 24 (3d8 + 6 + PB) [slashing] damage. 

Slam. Melee Weapon Attack: + attack bonus to hit, reach 10 ft., 1 target. Hit: 24 (3d8 + 6 + PB) [bludgeoning] damage. A creature that suffers this damage must succeed a Dexterity saving throw against DC 15 or fall prone.

Energy Beam.  As an action, you can release a concentrated beam of destruction. Targets in a 60ft long, 5ft wide line originating from you take 22(4d10) force damage +radiant damage equal to half the remaining hp of this form. After using this you are unable to attack for one action. Must first charge this attack using the charge bonus action. 

Charge. As a bonus action, you absorb all the magic in the air around you and charge it in your core. Allows you to use your Energy Beam attack during your action.