Eye of Sauron

Hexproof
When the Eye enters the battlefield, sacrifice 3
other lands. If you cant, sacrifice Eye of Sauron
and search your library for a basic land and
shuffle your library. Put it on top of your library.
{t}: Add {b/r}{b/r}{b/r}, at the beginning of your end
step, populate
At the beginning of your upkeep, if you control
10 or more creatures, transform Eye of Sauron
Commander tax only increases the
transformation threshold by 2.