When a monster would be Summoned, OR a Spell/Trap Card is activated: Pay half your Life Points; negate the Summon or activation, and if you do, destroy that card.
Near Mint Unlimited - $27.99
Lightly Played Unlimited - $23.99
Moderately Played Unlimited - $19.99
Heavily Played Unlimited - $16.99
Damaged Unlimited - $13.99