Activate only when an opponent's monster declares an attack. Negate that attack, and select another face-up monster your opponent controls. That monster attacks instead. (If it is in face-up Defense Position, change it to Attack Position.)
Near Mint Unlimited - $1.30
Lightly Played Unlimited - $1.20
Moderately Played Unlimited - $1.10
Heavily Played Unlimited - $1.00
Damaged Unlimited - $0.90