Dhimon, the Unfortunate

At the beginning of your upkeep each opponent
may pay {2} and exile the top card of your
library. You may play that card this turn. At the
beginning of your end step take 2 damage and
draw a card for each card exiled this way and
not played. (Each opponent may use once)
At the beginning of your precombat main phase,
if a player controls Dhimon's Pet, add {b} to your
mana pool for swamp on the battlefield.