mtg foundations collector booster box card list Magic: The Gathering Bundle 2 foil cards and 1 Best Magic The Gathering deal:

When this card is destroyed by your opponent's card (either by battle or by card effect): You can Special Summon 1 "Halloween" monster with 1500 ATK or less from your Deck in face-up Attack Position

However, since they cant be summoned directly from the hand to the Pendulum Zone like most Pendulum Cards, these special Monsters usually have specific card effects that allow them to move to the Pendulum Zone

Its similar as the Secret Rare v3 from the OCG, but with a rainbow/mirror-like silver name like a regular Secret Rare TCG

Sadly, even if you dont care about card condition, theres no escaping it, either

It's study time