Building up Itto in Genshin Impact is four parts downright easy and one part complete and utter hell, and it is all due to his ascension and Talent materials. For the most part, it is really easy to build and use the character! He’s a great guy, Itto! Sure, you need to fight some enemies. None of them are too taxing.
The problem is the Onikabutos. The humble Onikabuto is the bane of any Itto or Heizou player. It’s one of the most frustrating ascension materials, rivaled only by its cousin the Scarab. (Cyno mains know what I’m talking about.) While all of the other materials you need for Itto’s ascension and Talents are run of the mill, the Kabuto only appears in a few spots around Inazuma and is more of a pain to collect.
If you want to ascend Itto in Genshin Impact, you need 420,000 Mora, Prithiva pieces, the items dropped by slimes, the Golden Wolflord’s Riftbord Regalia, and… the Onikabuto. Slimes are easy. They’re everywhere. Get 18 Slime Condensate, 30 Slime Secretions, and 36 Slime Concentrates, and you’re all set. You probably already have them. The Golden Wolflord is a normal noss in Inazuma on one of the southern-most islands of Tsurumi Island. You don’t even need to clear the fog from the island to access it. Sail south. Fight it enough times to get 46 Riftborn Regalia, and you’re set. That boss also drops Prithiva Topaz Slivers, Fragments, Chunks, and Gemstones, so you might get enough of those too. You need 1 sliver, 9 fragments, 9 chunks, and 6 gemstones.
As for the Onikabuto, you need 168 of those little jerks. They are in the forested area and on Mount Yougou on Inazuma’s Narukami Island, though they can be difficult to find there. You’ll usually only find one at a time. To find a cluster, check the cavern beneath Inazuma City and the Raiden Shogun’s palace.
You can also find Onikabuto on rocks and trees on Kannazuka island and on Yashiori Island. On Yashiori, they’ll be on rocks near Jakotsu Mine. However, if you’ve been lazy (like me) and didn’t complete Orobashi’s Legacy (I get busy!), then there will be constant storms on Yashiori. On Kannazuka, there’s a barrier around Tatarasuna that remains in place until you finish the Tatara Tales quest. The Onikabuto here tend to be near the Waypoints near the area trapped under the Electro dome (which I also haven’t completed because I’m terrible). A few are on trees outside it, so wandering around the dome’s line can get you some if you are like me.
As for the Itto Talent materials, those are pretty easy to to get. They can just take a bit of time. Each talent will the following things. You need 1,652,000 Mora. You also need an additional 6 Slime Condensate, 22 Slime Secretions, and 31 Slime Concentrates. The books he needs are the Inazuma Elegance ones. You need three Teachings of Elegance, 21 Guides to Elegance, and 38 Philophies of Elegance. They can be acquired on Tuesdays, Fridays, and Sundays in the Violet Court domain on Kannazuka Island. If you haven’t unlocked the weekly boss fight Narukami Island: Tenshukaku, which is in Inazuma City, do that. It opens up after Archon Quest Chapter 2: Act 3 is done. Get six Ashen Hearts from that fight and you’ll be good. (It’s a random, not guaranteed, drop. Finally, you need one Crown of Insight for each Talent you max out.
Genshin Impact is available for the PS4, PS5, PC, and mobile devices, and the Itto banner will run December 7-27, 2022.