Perhaps instead of completely wiping the card (turning it essentially into a relic) it should randomize the card, either in-element or into any card. That way, it would still be a decent card, as it is still likely, particularly in mono/duo to give an unplayable card, but it's not broken OP because it's not guaranteed to turn everything into useless blanks. (i.e. looking at 2x arena draw that can blank 12 or 24 cards)
It could also give the interesting twist of being able to target -yourself- with it. That way, if you know that you don't have any way to beat the deck you're facing, you could scramble some of your own cards in the hopes that you might give yourself something to win with.