Destruction, Lord of Despair

Nightstrike, Indestructible
Whenever you cast a spell, roll a 6-sided die:
1-2: Gain two Night counters.
3-4: Up to three creatures you control gain
nightstrike until end of turn.
5-6: Mill 1 card. Lose X Night counters,
where X is that cards converted mana cost plus 1.
"For those with nowhere else to turn, I am here."
—Destruction