Melkor, the corrupter

When Melkor, the corrupter is put into a
graveyard, remove It from the game.
{t}-Take the control of a nonred and/or
nonblack creature. It becomes a spirit creature
in addition to its other types. It is black and
you can spend black mana for activate its
abilities.
Sacrifice a land. Regenerate Melkor, the
corrupter.