Archon

Built-in Thruster: This entity has no visible form of locomotion and appears to move by floating around. 

Autonomy: The Archon does not require air, water or food to live it is almost like a machine…

Cyborg?: The Archon looks like a mesh of a living creature and a metallic monstrosity, it is almost like a cyborg but you are not sure.

Legendary Resistance 5/day: If the Archon fails a saving throw, it can choose to succeed instead.

Augmented State: When the Drak reaches 1/4 of its HP it activates its augmented form, which doubles damage from attacks, all attacks do Drak damage and never miss and the repulsion effect increases thrice.

Drak Repulsor: +10 to hit, range 15 feet, the Archon uses a strange force to push its enemy away, you must roll on a DC 25 strength saving throw or be knocked 3d20 feet away, or half on a successful throw.

Drak Slicer: +19 to hit, range 20 feet, the Archon uses strange projectiles which deal 61(9d20+11) bludgeoning, slicing, force, psychic or piercing damage, it also knocks you 5d10 feet away.

Drak Antimatter Cannon: +76 to hit, range 1000 kilometers, deals 200(140d20+260) Drak Damage, (Drak damage hurts anything and is not affected by damage resistances or immunities). The Drak’s ultimate weapon

Cloak Device: At any moment the Archon can become invisible, but it cannot attack while in that state, it can flee or stall for time.