"You see, I want you to become a dark signer and join me
Moving Grass Energy between Pokmon can recover momentum after a knockout, boost a newly played attacker into action quickly, or respond to shifting board states
Instead of being facedown and being unable to use, Impending allows the card to be played face up, striking fear into your opponents (while also making the card vulnerable to removal)
For example, you can't cast a creature card with mayhem you couldn't normally cast during an opponent's turn, even if you discard that card during an opponent's turn
It's the kind of concept for a game that seems almost too obvious now that it has been done well, for which OPNeon Games deserves a lot of credit
per case (12 Japanese boxes), placing them at about 1 per 6 boxes on average