And Lugia ex worked because of Blastoise ex, and that was what made that deck top-tier. Holon's pokemon acted as a double rainbow, and with 2 water energy from Blastoise, you discarded 1 for the holon's energy, then you had all 3 for the attack.
But this thing is unequivocally the most broken card I've seen in a while:
Black Ballista: Discard 3 Energy attached to this Pokemon.
Say hello to our new Blastoise's BFFF. It's like the Black Kyurem from the next set we get. Except actually playable.
180 HP. Nothing resists him. Can get Eviolite or worse Crystal Wall to pump his HP up to 300. NOTHING can survive that kind of raw damage in this format without serious support.