Deal at Devil's Reef

Discard a card: Create a tapped Treasure token,
put a debt counter on Deal at Devil's Reef.
During your end step, exile four cards from your
graveyard. If you can't sacrifice Deal at Devil's
Reef.
When Deal at Devil's Reef leaves the battlefield,
each opponent creates a 1/1 blue Horror creature
token with menace for each debt counter on Deal
at Devil's reef.