Koala (Leader) - Legacy of the Master (OP12)

When this Leader attacks your opponent's Leader, if you have 2 or more Characters with a cost of 8 or more, draw 1 card.
[Once Per Turn] This effect can be activated when your opponent plays a Character with a base cost of 8 or more, or when your opponent plays a Character using a Character's effect. Your opponent adds 1 card from the top of their Life cards to their hand.