Janemba Pure Evil BT22-034 - Critical Blow - Dragonball Super Card Details

[Unique]
[Permanent] If your Leader is blue and you have a blue Z-Extra in your Battle Area, reduce the energy cost of this card in your Z-Deck by U, and reduce the Z-Energy cost by 1.
[Auto] When this card is played, choose up to 1 of your opponent's Battle Cards with an energy cost of 3 or less and place it at the bottom of its owner's deck.
[Auto] [Once per turn] If you have 4 or more energy: When one of you or your opponent's Battle Cards is placed at the bottom of its owner's deck, switch up to 1 of your energy to Active Mode at the end of the turn.