You can cast Dominate Beast, Dominate Monster, or Dominate Person once without taking Radiant damage or expending a spell use. When you cast one of these spells using this feature, you gain the following benefits. Once you cast one of these spells without taking Radiant damage, you must finish a Long Rest before you can cast the spell in that way again.
Overpowering Command
The target has Disadvantage on its saving throw against the spell.
Psychic Recoil
When the spell ends, you can choose to deal 6d8 Psychic damage to the target.
Iron Grip
If you cast Dominate Beast or Dominate Person, you can numb the target to pain. The target doesn't repeat its saving throw against the spell when it takes damage.