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.
Set Information including prices and price hyperlinkes are taken from TCGplayer.
Cardmarket Yu-Gi-Oh! Sets
Set Information including prices and price hyperlinkes are taken from Cardmarket.
We use the Cardmarket "Trend Price", as such this doesn't differentiate between card editions. It simply gives a sale trending price across all card versions.