Fatilis, Master of Horrors

Fatilis, Master of Horrors enters the battlefield with five -1/-1 counters on it.
{t}, pay X life: Destroy target creature with power X or less. Draw a card.
{1}{b}: Remove a -1/-1 counter from Fatilis, Master of Horrors or target Demon you control.
"Try me." -Fatilis, to Necroda