Libromancer Origin gives the deck an insane consistency boost by letting you set any Libro S/T which means you have now 12~ ways to get to the field spell via Origin, Terraforming , Drawing it or Libromancer Geek Boy who can be Emergency Teleport 'ed into the field from the deck. Diviner of the Herald is here to add more ways to get to your rituals by sending Herald of the Arc Light , which also makes Diviner a Lv6 that combined with Libromancer Agent or Libromancer Doombroker means you can make Ultimaya Tzolkin which in turn makes Crystal Wing Synchro Dragon .
This is one of the good ritual archetypes that lowers the minus you'd normally go through when playing a ritual deck, having a re-usable non once per turn ritual spell with Libromancer First Appearance , good disruption with Libromancer Intervention and Libromancer Displaced , and in general good levels.
Your basic combo would be something like:
E-Teli, Origin, Prep and Fire in hand
Origin > Set intervention, E-teli > Geekboy > Add First Appearance, Appearance > Add Agent, Preparation > Add Benten, Fire reveals Benten to special summon > Add dombroker, Agent Reveals Benten to special smmon, Appearance ritual effect tributes Benten for Doombroker > Benten adds Diviner, Normal summon Diviner and send Arc Light making her a LV6 > Arc light adds Firestarter, Diviner and Agent synchro into Ultimaya, Doombroker > Sets Displaced which triggers Ultimaya > Ultimaya summons Clear Wing, Appearance's ritual summon Firestarter using Geek. You now have 1 monster negate, 1 bounce and 1 Omni-negate, you can use Firestarter and Fire to make I:P, after using intervention to summon a libro you can quick-eff make unicorn.
Fisker Whisker from the Edo discord gave me the idea of Artifact Dagda > Artifact Scythe > + I:P which makes Sky Striker Ace - Azalea during the opponent's turn to pop scythe... so kudos to him