Yersin, Bubonic Zealot

Deathtouch

Whenever a nontoken creature you control dies,
you may have target opponent create a 1/1 Black
Rat creature token with " This creature can't be sacrificed." and " At the beginning of your upkeep,
you lose 1 life."
{4}{b}{b}: Each opponent loses X life where X is the
number of tokens they control.