Badeline, Dark Reflection

Protection from humans
Creatures you control with any -1/-1 counters
have deathtouch.
{t}: Add {b} to your mana pool for each creature
you control with any -1/-1 counters.
{b}{b}{b}: Put a -1/-1 counter on target
creature you control. Repeat this process a
number of times equal to the amount of
creatures you control with 0 power.