Plague Fighter's Sword

Whenever Plague Fighter's Sword enters the battlefield or equipped creature becomes tapped, remove all poison counters from all players.
Equipped creature gets -X/+X , where X is the equipped creatures power and has defender and
"{p/g}{p/w}, {t}: Until your next turn, all creatures lose infect."
"I cannot let the Phyrexians poison our world."
- Cannex, Mirrodin Plague Doctor.