Cast Wheel of Misfortune by paying ({2} magic symbol) ({R} magic symbol) .
Holding priority, cast Reverse Damage by paying ({1} magic symbol) ({W} magic symbol) ({W} magic symbol) , preventing all damage dealt by Wheel of Misfortune to you, and causing you to gain that much life.
Resolve Wheel of Misfortune, choosing an arbitrarily large number, and causing you to gain life equal to the number you chose.