Seeing it in this set at rare has already dramatically reduced the price, and its making this set very successful as a reprint-oriented one
Check the BIN in the meantime
Brimaz, once the proud and brave king of the Leonin on Theros, is now a corrupted Phyrexian cat, built to proliferate the +1/+1 counters on the Incubator tokens
If there are no nonland permanents on the battlefield other than an Oblivion Ring, and the card it exiled was another Oblivion Ring, casting a third Oblivion Ring will result in an involuntary infinite loop that will end the game in a draw. The reason for this ruling is due to the line break between the enters ability and the leaves ability, which puts two separate triggers onto the stack
It is important to understand these differences before deciding on a specific approach
The app (mentioned above) will also walk you through the game