Realmbreaker Demon

Sunder (As an additional cost to cast
this spell, you may sacrifice any number
of lands to pay {2} for each land sacrificed this
way.)
At the beginning of combat, if Realmbreaker
Demon is untapped, pay {b}{b} or tap
Realmbreaker Demon.
Pay 5 Life, {t}: Add {b}{b} to your mana pool.