Its a thoughtfully designed product, created by players of the Commander format in Magic: The Gathering , for players of Commander
The unreliability of this card gives it obvious appeal for chaos decks since you might end up leaving your opponent better off than they were before you cast it
Its hard to say how viable those lateral strategies are going to actually be, but I had fun trying to put them together, even if they hurt my win percentage in the moment
Want to remove a flashback spell like Snapcaster Mage targets
It's one of those features that threatens to make or break the game purely on its own - which would explain why the announcement adds that "The trading feature shown may not be available at launch", as if even more time might be needed to work out just how they're going to implement this idea without collapsing their whole business model
Note that at time of writing there are listings of Onslaught Biorhythm for under $30, so it may correct down before stabilizing