Voidcleaver Rune Blade

Indestructible
Equipped creature gets +3/-1 and Deathtouch.
Whenever equipped creature deals combat
damage to a player you may pay {1}{w/b}, if you do
you may put a -1/-1 counter on target creature
and you gain 1 life.
Equip {3}
Equip Nightbane or Nightmare {b}