Cieran Land, Neiran Mountains

{t}: Target basic mountain is a snow land in
addition to its other types.
{t}, tap a snow permanent you control: Tap and
exert target permanent with a converted mana of
equal to or less than the converted mana cost of
the tapped snow permanent.
{s}{s}, sacrifice Cieran Land, Neiran Mountains:
Exile target creature.
"These massive snowcapped mountains are famous for
being the largest mountain pass in Cier. Reaching tens
of thousands of meters high, they are literally
impassable withou