It can be cast by paying one life and discarding a Blue card from the player's hand, instead of paying the mana cost
Famously banned in Commander since before the Rules Committee combined the banned as/banned in Commander lists, this 9-mana mass board wipe was considered an unfun interaction in Commander games since it effectively restarts the game
With a wide selection of Commons, Rares, Super Rares, and even an exclusive Treasure Rare, the Op-12 booster delivers excitement with every opening
Thus the dilemma
You do lose some lifegain from their first ability, but the second ability is what Im interested in
As this effect only affects creatures, one easy way around this is to primarily use card types such as artifacts and Planeswalkers that are capable of targeting your opponents' permanents, rather than using creatures that can be more easily removed than ever