When an effect resolves that was activated by your opponent's Effect Monster on the field, they can discard 1 card. If they do not, that effect is negated.
NM-Mint Unlimited - $7.50
NM-Mint Unlimited Non English - $7.50
Lightly Played Unlimited - $7.20
Lightly Played Unlimited Non English - $7.20
Moderately Played Unlimited - $6.80
Moderately Played Unlimited Non English - $6.80
Heavily Played Unlimited - $6.00
Heavily Played Unlimited Non English - $6.00
Damaged Unlimited - $4.90
Damaged Unlimited Non English - $4.90
NM-Mint 1st Edition - $8.60
NM-Mint 1st Edition Non English - $8.60
Lightly Played 1st Edition - $8.20
Lightly Played 1st Edition Non English - $8.20
Moderately Played 1st Edition - $7.80
Moderately Played 1st Edition Non English - $7.80
Heavily Played 1st Edition - $6.90
Heavily Played 1st Edition Non English - $6.90
Damaged 1st Edition - $5.60
Damaged 1st Edition Non English - $5.60