When a monster(s) would be Summoned, OR a Spell/Trap Card is activated: Pay half your LP; negate the Summon or activation, and if you do, destroy that card.
Near Mint / Lightly Played Unlimited - $8.00
Moderately Played Unlimited - $7.00
Heavily Played Unlimited - $6.00
Damaged Unlimited - $5.00
Near Mint / Lightly Played 1st Edition - $5.00
Moderately Played 1st Edition - $5.00
Heavily Played 1st Edition - $4.00
Damaged 1st Edition - $3.00