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 - $3.50
Moderately Played Unlimited - $3.00
Heavily Played Unlimited - $2.50
Damaged Unlimited - $2.00
Near Mint / Lightly Played 1st Edition - $2.50
Moderately Played 1st Edition - $2.50
Heavily Played 1st Edition - $2.00
Damaged 1st Edition - $1.50