The Castle of Bones

Counts as Sulfurous Mire
{t}: Add {b} or {r}.
Sulfurous Mire enters the battlefield tapped.
The Castle of Bones is formed in the image of the very
old and almost forgotten Hogwatch tradition of blood,
meat, and sacrifice. Back in those days, the Hogfather
was not an amiable old man giving little kiddies toys.