Demonic Aura Nine-Sword Style Asura Demon Nine Flash [500 Years in the Future]

[Main] Up to 1 of your Leader or Character cards gains +3000 power during this turn. Then, you may rest 1 of your Characters with a cost of 3 or more. If you do, rest up to 1 of your opponent's Characters with a cost of 5 or less.
[Trigger] Rest up to 1 of your opponent's Characters with a cost of 4 or less.