A Pendulum Summon is a special type of summoning in the trading card game Yu-Gi-Oh!. It allows players to summon multiple monsters from their hand or face-up on their Extra Deck at once. This is done by using two Pendulum Monsters placed in the Pendulum Zones on the field, which have specific scale values. To perform a Pendulum Summon, the player must have a total level of the summoned monsters that falls within the range defined by the scales of the two Pendulum Monsters. This mechanic adds strategic depth to the game, enabling players to quickly build their board presence.