<001>'s passive reads "You can't gain energy in any other way (other than its passive triggering off opponent gaining energy)"
So does that mean that in a <001> mirror, no one gains any energy ever? What about when you successfully counter an opponent's card (because the card texts do say gain energy)?
So does that mean that in a <001> mirror, no one gains any energy ever? What about when you successfully counter an opponent's card (because the card texts do say gain energy)?