Clockwork Lesser Mage

Keep Away Tactics: The clockwork lesser mage is designed to avoid close encounter combat. It will do everything it can to ensure it takes on it's target's at a safe or seemingly unreachable position. If cornered, and under 10 HP, it will self destruct.

Immutable Form. The clockwork lesser mage is immune to any spell or effect that would alter its form.

Magic Resistance. The clockwork lesser mage has advantage on saving throws against spells and other magical effects.

Hive Mind: The Clockwork Lesser Mage can use the senses of any other Clockwork Lesser Mage within 1 Mile of one another. If one knows where you are, they all know where you are.

Innate Spellcasting. The clockwork lesser mage's innate spellcasting ability is INT (spell save DC 13). It can innately cast the following spells, requiring no material components. 

At will: Magic Missile at 1st level
3/day each: Eldritch Blast , Chromatic Orb
1/day: Magic Missile at 2nd level.

Self Destruct: If a hostile creature enters an adjacent space to the clockwork mage, and it is below 10 HP, it will self destruct dealing 3D8+3 Force Damage, killing itself. DC 13 DEX save, to take half damage.