7 cards where the card is tagged “gives-toxic”

Aspirant's Ascent (Phyrexia: All Will Be One #40)
Karumonix, the Rat King (Phyrexia: All Will Be One #98)
Necrogen Communion (Phyrexia: All Will Be One #99)
Phyresis Roach (Alchemy: Phyrexia #15)
Plague Nurse (Phyrexia: All Will Be One #179)
Prosthetic Injector (Phyrexia: All Will Be One #239)
Skrelv, Defector Mite (Phyrexia: All Will Be One #33)

This search is finished. Now the real work can begin.