Soul of Death

Deathtouch, Indestructible
Soul of Death can't attack or block unless there
are five or more -1-1 counters on creatures.
At the beginning of your upkeep, you may put X
-1-1 counters on target creature, where X is the
number of -1-1 counters on creatures.
{b}{t} Put a -1-1 counter on target creature.