Dagrath, Phyrexian Seer

: Dagrath, Phyrexian Seer enters the battlefield with X loyalty counters where X is the number of poison counters each player has.
: If a player would get a poison counter or a creature would get a -1/-1 counter, you can put a loyalty counter on Dagrath, Phyrexian Seer instead.
: Whenever Dagrath, Phyrexian Seer gets a loyalty counter, create a 1/1 black Slime creature token with infect.