If you didn't have to put it in your discard pile as soon as it's job was done, it would probably be banned. Quite an overpowered trainer card, on the other hand!
Wonder Energy doesn't prevent effects from Tools, only attacks so unless I'm missing something, Wonder Energy won't be of much use.There is a heavy focus on effect damage in this set. I almost get the feeling that they want everyone to start packing Fairy Toolbox decks with a few Wonder Energies...
Yep just use Eco ArmSo is that a 1 turn rock guard?
Well, I'd just pass the turn and puff... they go in the discard pileImagine 3 of them in a Toolbox Sigilyph ahahaha