kings court booster box case Grand Archive Phantom Monarchs Sealed (6 Booster Boxes) Joining the royal court is the World Premiere Joker’s Knight Yu-Gi-Oh! King's Court - Booster

Assuming youre playing four copies of Kolvori, then the previously mentioned nineteen non-Kolvori legendary creatures will put you at over 95% to find a card off Kolvoris activated ability, which is absurdly consistent

Some variants won't have room and it could get in the way of milling your Lightsworns, but pure variants can easily fill out their deck with a couple of them

I didnt ask permission but its in the name of justice so hopefully you dont mind

The only closest card is a similar one print wonder, Shichifukujin Dragon, whose card is slightly less rare because its printing plates were never confirmed to be destroyed, unlike the 1996 World Champion's plates