Grim Darkness

Grim Darkness enters the battlefield with 3 death counters.
Each time you tap Grim Darkness, remove 1
death counter.
{t}: adds {b}{b}{b}{b}{b} for one turn until your next upkeep.
-Lose 1 life for each mana not spent on your next upkeep.
-If there are no death counters, sacrifice this card
into the graveyard.