(: Add or to your mana pool.)
When Swamp Den enters the battlefield, sacrifice it unless you pay 2 life.
, , Pay 1 life: Put a 1/1 black Horror creature token onto the battlefield.
, : Put a 1/1 Bird creature token onto the battlefield.
: Add 
or 
to your mana pool.), , Pay 1 life: Put a 1/1 black Horror creature token onto the battlefield.
, : Put a 1/1 Bird creature token onto the battlefield.
