Charlestone - Awakening of the New Era (OP05)

[Counter] Up to 1 of your Leader or Character cards gains +4000 power during this battle. Then, you may trash 1 card from your hand. If you do, set up to 3 of your DON!! cards as active.
[Trigger] Rest up to 1 of your opponent's Leader or Character cards with a cost of 3 or less.