Clockwork Archer

Pack Tactics. When the clockwork Soldier is within 10ft of another clockwork soldier, they have an advantage on attack rolls

Self Destruct. When the clockwork soldier drops below 0 hit points, it explodes with gears and flames reaching everywhere within a 10ft sphere of its death. Each creature within that sphere must make a Dex saving throw with a DC12 or take 1d8 fire damage and 1d4 piercing damage, or half as much on a successful one.

Computer Eye. When the clockwork archer misses an attack with its bow, it may choose to succeed instead. This can only occur once.

Bow: +2 to hit, reach 150/600 ft., 1 target. Hit: 5 (1d8 + 2) [piercing] damage. 

opportunity attack. You can make an opportunity attack when a hostile creature that you can see moves out of your reach. To make the opportunity attack, you use your reaction to make one melee attack against the provoking creature. The attack occurs right before the creature leaves your reach