This 5/5 stops opponents from gaining life, has Menace, and turns the mana cost of every first spell of a players turn into damage against another player
Getting an urgent call from the hospital about Rio, Shark rushed there with Yuma and Tori to find Rio crying out in pain
To counteract this there is a mechanic called Banish that is like sending a card to the graveyard, but in this case, it is removed from the game period
But I dont think cards like this should ever existregardless of how hard the hoop is to jump through, Thassas Oracle is just too inexpensive and too acceptable on its own for a card that says you win the game. I think Thassas Oracle is a consequence of three things: Jace, Wielder of Mysteries blurring the lines of whats acceptable, a dictate to power up cards (including ones that normally wouldnt be meant for Standard), and a loss of institutional knowledge within Play Design about effects to be extra cautious about
The reason for the Chaos Orbs illegality is the rather bizarre way its played onto the table
SAR rate is approximately 33% (1-in-3 boxes), and MUR rate is approximately 2% (1-in-50 boxes)