Hogaak, Planar Doom

You can't spend mana to cast or activate mana abilities on this spell.
Emerge {5}{b}{b}{b}
Convoke, delve, improvise
Hogaak enters the battlefield with a +1+1 counter
on it for each card you own in exile.
Escape—{4}{b/g}{b}, Exile four other cards from
your graveyard.