Yersinia Pestis, Unmasked

Infect (This creature deals damage to creatures in
the form of -1/-1 counters and to players in the form
of poison counters.)
At the beginning of each end step, if a player
received any poison counters,
Yersenia Pestus, Unmasked may place that many
poison counters on target player.
At the beginning of each upkeep, if a player cast
two or more spells last turn, transform Yersenia
Pestus, Unmasked