When a Spell/Trap Card, or monster effect, is activated that would inflict damage to you: Negate the activation, and if you do, Special Summon 1 Link Monster from your GY.
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.