Biorhythm Price

Updated 2026-07-22

Biorhythm from Onslaught is a Commander-banned green sorcery that sets each player's life total to the number of creatures they control, instantly winning the game for any player with a large creature army when opponents are left with few or none. That ban is central to its market: demand is concentrated in casual and kitchen-table formats where house rules permit it, and among collectors who seek complete Onslaught playsets or run their own metas outside the ban list. The 30-day appreciation reflects niche demand from casual players and Onslaught collectors. The card was printed in 2002 and supply from that run is fixed. Cards banned in Commander often trade at a modest premium precisely because they are associated with memorable game-ending moments in casual play, and Biorhythm remains one of the most dramatic finishers from its era.