Mountain of Bone

(Palaces are treated as lands. You may play a palace
in place of a land on your turn. The number at the
bottom right corner indicates the number of Palaces
with the same name you can have in your deck.)
{b}{b}{b}: Create two 2/2 black dread creature
tokens.
As long as you control 10 or more Dreads,
Mountain of Bone is a creature with "This
creature's power and toughness is equal to the
number of Tokens you control." It's still
a Legendary Palace.