"Spellbook of Judgment" Rating Score by ブルーバード

The spell search is dynamic, but even if you search for it late in the end phase, the timing is bad and it tends to rot, so the card's reputation has been declining recently. However, he was not very popular even at the time, as archetypes that made use of spell search quickly disappeared from the environment.
The real reason this card was one of the strongest Yu-Gi-Ohs of all time is that he can recruit any Spellcaster, and he's a Quick-Play Spell.
There are powerful meta cards such as Jōgen and Kaiku among the Spellcasters that can be called, and the movement to reliably release these monsters in advance is called the God Jōgen System, which was the optimal solution for meta beats at the time and is still widely used today. It's a strong move at the level to do.
Also, the biggest merit of being a Quick-Play Spell is that he can shoot during the opponent's turn. By shooting this card at the start of your opponent's turn, you can give your opponent a bargain whether to not let him shoot his spell cards or to search a lot of them. Even if the opponent doesn't shoot, if he uses a Quick-Play Spell on his own, it will be a card that can safely land his Spellcasters such as Maiden with Eyes of Blue while reliably searching at a time when it is difficult to spoil. Do you know how much it means to say that the opponent's turn is actually an extra turn?
Because of its Quick-Play Spell, even the Shock Ruler, which was still alive at the time, was said to be inadequate as a countermeasure.
It will be difficult to return unless Spellcaster's recruitment and activation timing are taken into account.
It seems that if you say something like that, you will come back. No errata, but it's okay.