Blizzard E.M.M.I.

Keen eye. Has advantage on perception checks involving sight or sound and has a plus 10 to perception despite the wisdom score. 

Electric surge. Is immune to electric damage and heals the same amount that it would normally take.

Different armor. The eye of the E.M.M.I. has an AC of 17 and doesn't have the resistances to slashing, bludgeoning and piercing.

Ice armor. On direct contact with the E.M.M.I. the attacker takes 5 (2d4) cold damage as long as the attack doesn't hit the eye.

Cold start. The Blizzard E.M.M.I. can force a opponent to go last.

Claw. Melee Weapon Attack: +10 to hit, reach 5 ft., 1 target. Hit: 16 (4d6 + 4) slashing damage. Can grapple the target, strength check against the E.M.M.I. 

Needle. Melee Weapon Attack: +10 to hit, reach 5 ft., 1 target. Hit: 16 (2d12 + 4) piercing damage. Has disadvantage against non-grappled targets. Takes aways max hp equal to the amount of damage done. Opens eye plate to allow attacks on it.

Ice missile barrage. 5-150ft range, 50 targets, deals 5 (2d4) cold damage. Works like magic missile, and on hit dc 19 con save, or be slowed 10 feet. Opens up eye to damage.

Ice missile. 5-50ft range, 5 targets, deals 2(1d4) cold damage. Works like magic missile, and on hit dc 17 con save, or be slowed 10 feet. Opens up eye to damage.

Electric surge. When hit by lightning damage it can use its ice missile barrage action.

It has one singular point that it can only use once.

Ice Missile Bombardment (costs 1 action). The blizzard E.M.M.I. shoots off 150 ice missiles with the same properties of the ice missiles of its bonus action.