I kind of sympathize with people creating alt-accounts - I was really tempted to do it once when everyone in a forum was semi-blatantly bullying me (in a way that would be obvious to an 3rd party - like I want to mod a Mafia game, literally none joins; there's a loophole in the rules to my setup, I'm almost banned (saved by the site mod) when I try to enforce it the way it was obviously intended; games I'm in have the "random" numbers fudged against me (like I roll a d20 15 times in a row, they're all 1s)).
This isn't that germane to the current conversation, but I definitely think alt-accounts are not as immoral as most people on here think they are. It can be a way to check if there's prejudice or not. (If this is the same person, it definitely proves the "problem" is on his side - the quality of the cards, not the username, matters to us)
PPE: The concept of an alt-treasure that destroys itself is actually a really good concept. I tried to revamp his cards, but the only one that really worked out was Bomb, changed from "Trash a card in your hand and this" to "+2 Cards; Trash any number of cards in your hand and this."