Xyer, the Painful Death

Eminence - At the beginning of your end step, if
Xyer is in the command zone or on the battlefield, if an opponent got one or more poison counters this turn, they get another poison counter.
Xyer's power and toughness are each equal the
number of poison counters your opponents have.
{2}{b}{g}{p/b}{p/g}: Xyer gains infect until end of turn. Activate this ability only if an opponent has 5 or
more poison counters.