Majin Buu's Human Extinction Attack (BT9-134) [Universal Onslaught]

Product Details

[Activate:Battle] If your Leader Card is black : Choose up to 1 of your Leader Cards or Battle Cards and it gets +15000 power for the duration of the battle.
[Auto] If all of your energy is black : When you activate this card, choose up to 1 Battle Card in your opponent's Drop Area, send it to their Warp, then place up to 4 cards from the top of your deck in your Drop Area.