Actions

Force-Empowered Rend. Melee Weapon Attack: +4 to hit, reach 5 ft., one target you can see. Hit: 1d8+2 force damage.
  Repair (3/day). The magical mechanisms inside the defender restore 2d8+2 hit points to itself or to one construct or object within 5 feet of it.

Reactions

Deflect Attack. The defender imposes disadvantage on the attack roll of one creature it can see that is within 5 feet of it, provided the attack roll is against a creature other than the defender.