Trueno Bastardo

[Main] Choose up to 1 of your opponent's Characters with a cost of 4 or less and K.O. it. If you have 15 or more cards in your trash, choose up to 1 of your opponent's Characters with a cost of 6 or less instead of a Character with a cost of 4 or less.
[Trigger] You may rest your Leader: K.O. up to 1 of your opponent's Characters with a cost of 5 or less.