The Billion-fold World Trichiliocosm (Jolly Roger Foil)

"[Counter] Up to 1 of your Leader or Character cards gains +2000 power during this battle. Then, if you have 8 or more rested cards, that card gains an additional +2000 power during this battle.[Trigger] K.O. up to 1 of your opponent's rested Characters with a cost of 3 or less."