Since Son Goku unleashed the power of Super Saiyan 4 in Dragon Ball Daima, many shonen fans have been wondering where it comes from. Was this a power that Neva The Namekian only had access to? Was Goku able to tap into his Saiyan ancestry to achieve the form?

Here's how the finale of Dragon Ball Daima explains why Goku never uses Super Saiyan 4 in the follow-up series, Super.

If you weren’t aware of Super Saiyan 4’s origin in Dragon Ball Daima, the finale reveals that Goku was able to achieve the level through off-screen training. While he first debuted the transformation as a child in the fight against Gomah thanks to Neva the Namekian,