35 cards where the color identity ≤ B and (the card has the keyword “Infect” or the card has the keyword “Poisonous” or the card has the keyword “Toxic”)

Bilious Skulldweller (Phyrexia: All Will Be One #83)
Blackcleave Goblin (Scars of Mirrodin #54)
Blightbelly Rat (Phyrexia: All Will Be One #85)
Blightsteel Colossus (Double Masters #235)
Blightwing Whelp (Alchemy: Phyrexia #8)
Contagious Nim (Scars of Mirrodin #58)
Core Prowler (Mirrodin Besieged #103)
Corpse Cur (Scars of Mirrodin #147)
Dune Mover (Phyrexia: All Will Be One #226)
Flensermite (Mirrodin Besieged #41)
Flesh-Eater Imp (Duel Decks: Mirrodin Pure vs. New Phyrexia #58)
Hand of the Praetors (Scars of Mirrodin #66)
Happy Dead Squirrel (Unfinity Sticker Sheets #8)
Ichorclaw Myr (Scars of Mirrodin #166)
Ichor Rats (Scars of Mirrodin #67)
Karumonix, the Rat King (Phyrexia: All Will Be One #98)
Myr Convert (Phyrexia: All Will Be One #234)
Necropede (Scars of Mirrodin #185)
Nimraiser Paladin (Phyrexia: All Will Be One #101)
Pestilent Syphoner (Phyrexia: All Will Be One #103)
Phyrexian Crusader (Mirrodin Besieged #50)
Phyrexian Digester (Mirrodin Besieged #120)
Phyrexian Juggernaut (Duel Decks: Mirrodin Pure vs. New Phyrexia #63)
Phyrexian Vatmother (Mirrodin Besieged #52)
Plague Myr (Duel Decks: Mirrodin Pure vs. New Phyrexia #51)
Plague Stinger (Scars of Mirrodin #75)
Reaper of Sheoldred (New Phyrexia #72)
Ribskiff (Phyrexia: All Will Be One #240)
Scourge Servant (Mirrodin Besieged #54)
Septic Rats (Mirrodin Besieged #55)
Sheoldred's Headcleaver (Phyrexia: All Will Be One #109)
Skithiryx, the Blight Dragon (Double Masters #107)
Stinging Hivemaster (Phyrexia: All Will Be One #110)
Toxic Nim (New Phyrexia #75)
Whispering Specter (New Phyrexia #77)

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