Helping Hand Son Gohan (BT7-007) - Assault of the Saiyans

[Counter:Attack] Negate the attack and play this card. ([Counter] is activated from your hand by paying the card's energy cost.)
[Permanent] During your opponent's turn, if "Son Goten" and "Trunks: Youth" cards are in play in your Battle Area, reduce the energy cost of this card in your hand by 2.