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 - $6.30
Lightly Played Unlimited - $5.70
Moderately Played Unlimited - $5.10
Heavily Played Unlimited - $4.50
Damaged Unlimited - $3.20