Ahnat Djerra, Phase Duplicate

Inflict, Phasing, Partner
Whenever Ahnat Djerra, Phase Duplicate enters
the battlefield or phases in you may put an additional Poison counter on target player that
already has a Poison counter on it, if no player
does put a -1/-1 counter on target creature.
{u/b}{p/b}: Target creature gets -0/-1 and gains Infect
until end of turn.