Vigilant. The defender can't be surprised.
Force-Empowered Rend. Melee Weapon Attack: your spell attack modifier to hit, reach 5 ft., one target you can see. Hit:1d8 + PB force damage.
Repair (3/Day). The magical mechanisms inside the defender restore 2d8 + PB hit points to itself or to one construct or object within 5 feet of it.
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.