Anubis's Portal

If an Anubis planeswalker is active on the
battlefield, Anubis's Portal remains open. While
open, place an {e} counter on it any time a sorcery
is played during your turn.
{e} counters can be used inplace of mana to cast
any black creature or sorcery from your hand.
If an Anubis planeswalker is not active, the portal
remains closed. While closed, it can be {t} for {b}.