Trunks, Forerunner of Hope (P-139) - Tournament Promotion Cards

[Auto] At the end of your turn, if your Leader Card is blue, you may choose 1 Battle Card in your energy other than {Trunks, Forerunner of Hope} that is blue and no other colors, has an energy cost of 3 or less and 15000 power or more, and play it. If you do, add this card to your energy.