Mad Archfiend is a Rare Effect Monster card from Yu-Gi-Oh! (Crossroads of Chaos, CSOC). Current market price: $0.31.
Rare
Crossroads of Chaos (CSOC)
Card Text
If this card attacks a Defense Position monster, inflict piercing battle damage to your opponent. If this face-up Attack Position card is targeted for an attack: Change it to Defense Position.
