Enchant permanent
When Volition Reins enters the battlefield, if enchanted permanent is tapped, untap it.
You control enchanted permanent.
Gaining control of a permanent doesn’t cause you to gain control of any Auras or Equipment attached to it.
If the enchanted permanent is untapped as Volition Reins enters the battlefield, the triggered ability won’t trigger at all.
Volition Reins may target and may enchant an untapped permanent.