Glacial Erratic

{t},Sacrifice Glacial Erratic: Add {s}
{t},Sacrifice two rocks: Add {s}{s}. Draw a card.
{1}{s}:Exile Glacial Erratic. You may search your
library for two rock cards. Put one in your hand
and the other on the battlefield, then shuffle.
A deck may have any number of cards
named Glacial Erratic.