|Japanese (base text)||
A Pendulum Scale (Japanese: ペンデュラムスケール Pendyuramu Sukēru, abbreviated
Pendulum Scales are used in Pendulum Summoning. If there is a Pendulum Monster in both of the two Pendulum Zones, once per turn monsters in the hand and/or Pendulum Monsters that have been sent face-up to the Extra Deck can be Pendulum Summoned as long as their Levels are in between the Pendulum Scales of the two monsters. (Therefore, monsters cannot be Pendulum Summoned if the monsters in the two Pendulum Zones have the same Scale, or Scales that are only one number apart.) In the anime, the Pendulum Scale appears as a glowing number below the Pendulum Monster when it is in the Pendulum Zone.
All Pendulum Monsters seen to date have the same Pendulum Scale value on both sides of their card. It is currently unknown whether a monster can have two different Pendulum Scale values.
A monster's Pendulum Scale seems to have some link to its Level, with higher-Level monsters tending to have lower Scales. Additionally, since most Pendulum Monsters released to date don't have a Scale equal to their Level/Rank, this means that those monsters can be potentially Pendulum Summoned using another copy of themselves.
As with Levels, Ranks, ATK, and DEF, there appear to be some unofficial conventions that govern how high or low a monster's Pendulum Scale values may be. A monster's Pendulum Scales may be as low as 2 or as high as 7 in normal cases; having a Scale of 1 or lower or a Scale of 8 or higher requires that the monster's Pendulum Effect have negative effects or conditions that restrict its use. More recently, Pendulum Monsters with Scales of 1 and 8 have been seen without any constraints.
As with all four of the above, a monster's Pendulum Scale may change from its printed number during a Duel due to other card effects. Currently in the OCG/TCG, a monster's original Pendulum Scale may range from 0 to 13; no effects can currently reduce a Pendulum Scale to below 1, but effects can theoretically raise the Pendulum Scale to any number above 10 (e.g. "Yosenju Shinchu R", "Performapal Guitartle"). In the anime, original Scales of 11 and 12 have been seen.
- Until the release of Booster Pack Maximum Crisis in 2017, there were no Pendulum Monsters with a Scale of 0, so it was completely impossible to Pendulum Summon Level 1 monsters.
- yugioh-card.com/en Learn How to Pendulum Summon Tutorial Video (English)