Phyrexian Blight Fountain

Phyrexian Blight Fountain enters the battlefield
with 5 Corruption counters.
{t}: Sacrifice a creature: Remove 1 Corruption
counter. Target player gets 2 poison counters.
When Phyrexian Blight Fountain has no
Corruption counters on it, sacrifice it. If you do,
create five 2/2 creatures tokens with infect.