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 - $1.10
Lightly Played Unlimited - $1.00
Moderately Played Unlimited - $0.90
Heavily Played Unlimited - $0.60
Damaged Unlimited - $0.50