4 (フォー, ) is a Forge Disc released as part of the Burst System as well as the God Layer System. It debuted with the release of the B-75 Booster Blaze Ragnaruk 4Cross Flugel on March 18th, 2017. It later debuted in western countries with the release of the SwitchStrike Starter Pack Wyvron W3 4Glaive Atomic.


4, like other even numbered Core Discs, is symmetrical and elliptical in shape in order to facilitate a Disc Frame. Each side features two protrusions, one molded into the shape of a "4" and the other molded into the shape of the Roman Numeral "IV". The protrusions extend further from the center more than other Core Discs which grants 4 high Outward Weight Distribution and subsequent Stamina potential. As a Core Disc, 4 is comparatively heavier than regular Forge Discs such as Heavy and Gravity which grants higher KO resistance and the ability to facilitate Disc Frames can add characteristics such as Life After Death with Cross or Glaive. While 7 has greater Stamina, 4's Stamina is still comparable.


Overall, 4 features high Stamina without the massive Burst risk posed by 8 and high weight for KO resistance making the Core Disc a key part in Stamina, Defense and Attack Combinations. When paired with Frames such as Cross or Glaive, Combinations using 4 have high Life After Death as well.

As such, 4 is a must have for competitive bladers.


Takara Tomy



Takara Tomy



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