Bronze Drake Guardian

Keen Senses. The Bronze Gryphon has proficiency in the perception skill.

Cone of anti invisibility. Radiating from its eyes the Drake Guardian constantly projects a 30ft cone of powerful dispelling magic. Any creature or object under an invisibility spell that comes in contact with the cone will promptly have its invisibility cease. Magic items with continual usage, such as cloaks of invisibility will also be deactivated for 10 minutes, upon which they regain their function.

Innate Spellcasting. The Bronze Drake Guardian's innate spellcasting ability is Intelligence (spell save DC 14, +6 to hit with spell attacks). The Drake Guardian can innately cast the following spells, requiring no material components:

at will: control flame

3/day each: ray of enfeeblement, bane, shield

1/day each: magic circle, counter spell

Multi attack. The Bronze Drake Guardian makes three claw attacks per turn, or use its fireball. Additionally it may spend its bonus action making a claw attack if it has made none during its action 

Claw. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 16 (2d10 + 6) slashing damage. 

Radiant Fireball. (recharge 5-6) The Bronze Drake Guardian fires a small ball of fire from its mouth targeting a point within a range of 130ft,when the ball hits it rapidly expands into a 20ft infernal sphere dealing 8d6 fire damage and  2d6 radiant damage on a failed (DC 16) Dex check, on a save the fire damage is halved.