Undead Battlemight

You may choose up to six zombies or skeletons you control within range. Whenever a chosen undead makes an attack roll or a saving throws before the spell ends, it can roll a d6 and add the rolled number to the attack or saving throw. In addiction, whenever one of the chosen undead hits a target with a successful attack roll, it inflicts extra damage on one target of that attack equal to your spellcasting modifier.