"[...] into the pool of your mark". Well that sounds like it's the mark of the one who played it.
Other than that, i'd increase the cost by 1 at least because:
-It would be the one card able to break unbreakable shields, which then benefits all your creatures and spells;
-Some decks have a mark they use only for a couple quanta, like Shrieker rushes (time mark). Rainbow decks, too. That would basically mean "deplete the enemy of all his actually useful quanta".