Nemesis, Lethal Tyrant

Trample, haste
Whenever Nemesis deals damage to a creature,
put an infection counter on that creature.
At the beginning of your upkeep, put a +1/+1
counter on Nemesis for each infection counter
among permanents.
{t}, Sacrifice another creature: Nemesis deals 2
damage to target creature. Put an additional infection counter on that creature.