Endless Debate

Choose an opponent. You and that player each
roll a six-sided die. If both results are not the
same you and that player each put the top two
cards of your library into your graveyard. Repeat
this process until both results are the same.
You and that player each gain life equal to the
total number of cards put into graveyards this way.
"Well... that was cathartic wasn't it?"
"I hate you..."