Grisly Example

Whenever a creature you don't control dies, add
a Mutilate counter to Grisly Example, then roll a
d20. If you roll a 20, double the number of
Mutilate counters on Grisly Example.
At the beginning of each opponents upkeep, creatures they control get -1/-1 for each Mutilate counter on Grisly Example.
The large snarling warlord could only underestimated
the man for a second, for a second was all he had left.