8 cards where the name includes “conversion”

Conversion (Masters Edition IV #9)
Conversion Apparatus (Modern Horizons 3 Commander #76)
Conversion Chamber (New Phyrexia #133)
Cyber Conversion (Doctor Who #38)
Disturbing Conversion (March of the Machine #54)
Failed Conversion (March of the Machine #103)
Nanogene Conversion (Doctor Who #49)
Unexpected Conversion (Alchemy: Innistrad #13)

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