45 cards where the card types include “creature” and the card has the keyword “Infect”

Blackcleave Goblin (Scars of Mirrodin #54)
Blighted Agent (New Phyrexia #29)
Blight Mamba (Scars of Mirrodin #112)
Blightsteel Colossus (Double Masters #235)
Blightwidow (Mirrodin Besieged #77)
Chained Throatseeker (New Phyrexia #30)
Contagious Nim (Scars of Mirrodin #58)
Core Prowler (Mirrodin Besieged #103)
Corpse Cur (Scars of Mirrodin #147)
Cystbearer (Scars of Mirrodin #117)
Fallen Ferromancer (New Phyrexia #82)
Flensermite (Mirrodin Besieged #41)
Flesh-Eater Imp (Duel Decks: Mirrodin Pure vs. New Phyrexia #58)
Glistener Elf (New Phyrexia #111)
Hand of the Praetors (Scars of Mirrodin #66)
Ichorclaw Myr (Scars of Mirrodin #166)
Ichor Rats (Scars of Mirrodin #67)
Lost Leonin (New Phyrexia #13)
Necropede (Scars of Mirrodin #185)
Ogre Menial (New Phyrexia #89)
Phyrexian Crusader (Mirrodin Besieged #50)
Phyrexian Digester (Mirrodin Besieged #120)
Phyrexian Hydra (Mirrodin Besieged #85)
Phyrexian Juggernaut (Duel Decks: Mirrodin Pure vs. New Phyrexia #63)
Phyrexian Swarmlord (New Phyrexia #119)
Phyrexian Vatmother (Mirrodin Besieged #52)
Plague Myr (Duel Decks: Mirrodin Pure vs. New Phyrexia #51)
Plague Stinger (Scars of Mirrodin #75)
Priests of Norn (Mirrodin Besieged #16)
Putrefax (Scars of Mirrodin #126)
Razor Swine (New Phyrexia #92)
Reaper of Sheoldred (New Phyrexia #72)
Rot Wolf (Duel Decks: Mirrodin Pure vs. New Phyrexia #54)
Scourge Servant (Mirrodin Besieged #54)
Septic Rats (Mirrodin Besieged #55)
Shriek Raptor (New Phyrexia #24)
Skithiryx, the Blight Dragon (Double Masters #107)
Spinebiter (New Phyrexia #121)
Tangle Angler (Scars of Mirrodin #128)
Tel-Jilad Fallen (Scars of Mirrodin #130)
Tine Shrike (Mirrodin Besieged #17)
Toxic Nim (New Phyrexia #75)
Viral Drake (New Phyrexia #49)
Viridian Corrupter (Duel Decks: Mirrodin Pure vs. New Phyrexia #56)
Whispering Specter (New Phyrexia #77)

The message was clear to Sorin—time to search for something else.