Intensifying Power Trunks (BT4-012) - Colossal Warfare Foil

[Auto] When this card attacks, you may choose 1 card in your life and add it to your hand. If you do so, this card gains +10000 power and [Critical] (When this card inflicts damage to your opponent's life, they place that many cards in their Drop Area instead of their hand) for the duration of the turn.