Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (1d10 + 3) piercing damage plus 3 (1d6) lightning damage.

Bazzap (Recharge 5 - 6 [roll d6, higher number = charged). The Crok fires a blue-hot laser from the mechanical attachment on its back in a 30-­foot line that is 1 inch wide. Each creature in that line must make a DC 12 Dexterity saving throw, taking 2d10 fire and piercing damage (each separate rolls) on a failed save, or half as much damage on a successful one.

Terminate Sequence (2d20 + 4 for sequence number, 1 usage). YOU MONSTER. HOW DARE YOU TO EVEN READ THESE.  To activate the sequence correctly, roll DC 13 perception check to take sight of the code that is burned on the side of the Crokilator and then shout the sequence command at min. 30 ft distance for it. If successful, the Crokilator will proceed to dash to the nearest enemy that is deemed the upper most threat to the party in a 40 ft radius, turn dormant for 1 minute, and then self-destruct. At this point in time, the Crokilator cannot be stopped under any circumstances.

...

The explosion causes a 200 ft wide, 400 ft tall cylinder of nuclear-blue flames. All creatures with the area must make a DC 19 dexterity saving throw to take half damage or take 10d20 fire and force damage. 

Note: Great job, Dr. Uoof. You now killed your only friend that you've had in centuries.