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Although manyGenshin Impactfans are pretty familiar with Collei thanks to her role in the manga, she was finally released as a playable character in the game at the beginning of the Sumeru arc. Though she’s only a four-star, she’s exciting for two reasons: the aforementioned familiarity in the player base, and the fact that she’s one of the first playable Dendro characters ever released.
Anyone hoping to add Collei to their team should level her up and upgrade her talents. Her talents and ascension both require a host of materials and Mora, which this guide will outline.

Leveling Materials
EveryGenshin Impactcharacter needs a metric ton of EXP and a fortune in Mora to reach level 90, which is the highest level. Here are the totals, divided by ascension level:
1-20

120,175
24,200

20-40
578,325

115,800
40-50

579,100
116,000

50-60
854,125

171,000
60-70

1,195,925
239,200
70-80
1,611,875
322,400
80-90 (max)
3,423,125
684,800
8,362,650 EXP
1,673,400 Mora
Collei Ascension Items
Collei is one of the first playable characters to need Nagadus Emerald, which is the ascension gem for Dendro characters. Additionally, she’ll need a few items found in Sumeru and some Hilichurl drops.
20
-
20,000
40
40,000
50
60,000
60
80,000
70
100,000
80
120,000
46
168
420,000
Gemstones - Where to Find Nagadus Emerald
While many players had stockpiles of the elemental gems that were around since the game’s launch, Nagadus Emerald will have been in much shorter supply, since it wasn’t available until Sumeru debuted. As such, how to get Nagadus Emerald was at the forefront of many players' minds.
Most of this green gem will come from defeating bosses, the following of which are capable of dropping it:
For a guide to all the other ways to find Nagadus Emerald,click here.
Enemy Drop - Where to Find Hilichurl Arrowheads
The only Collei ascension materials that could be found before Sumeru’s release are the Arrowheads dropped by Hilichurl Shooters. While any type of Hilichurl, Samachurl, Lawachurl, or Mitachurl can drop Masks, only Hilichurl Shooters (the ones with crossbows) are capable of dropping these ascension items.
The higher a Hilichurl Shooter’s level, the better their drops can be, as shown here:
Read More:Hilichurl Shooter Locations
Boss Drop - How to Get Majestic Hooked Beak
Collei’s boss item is the Majestic Hooked Beak, which is only obtained in one place: Sumeru. Specifically, this item will drop from the Jadeplume Terrorshroom, a normal boss that is found in the northwest part of the region’s rainforest area.
This boss has a pretty high resistance to Dendro damage, so Collei might not be the best bet for who to bring into battle.
Read More:Jadeplume Terrorshroom Boss Guide
Local Specialty - Where to Find Rukkhashava Mushrooms
Every region is home to some local specialty items, and every character will use one of them for their ascension. Collei’s is a regional Sumeru specialty: Rukkhashava Mushrooms. These blue and purple fungi can be found most commonly in the Avidya Forest and the Ashavan Realm, and many of them may be dotted around underground caves.
Unfortunately, Rukkashava Mushrooms cannot be grown in the Serenitea Pot, but there are two vendors who sell them: Ashpazi, in Gandarvha Ville, and Aramani, an Aranara found under a rock formation in Varanara. Both of them sell five Rukkhashava Mushrooms for 1,000 Mora each, restocking every three days.
Read More:Rukkhashava Mushroom Locations
Collei Talent Materials
Collei is a talented woman, and like every other character, has three talents that can be upgraded with the right materials.
1-2
3x Teachings of Praxis
12,500
2-3
2x Guide to Praxis
17,500
3-4
4x Guide to Praxis
25,000
4-5
6x Guide to Praxis
30,000
5-6
9x Guide to Praxis
37,500
6-7
4x Philosophies of Praxis
1x Tears of the Calamitous God
7-8
6x Philosophies of Praxis
260,000
8-9
12x Philosophies of Praxis
2x Tears of the Calamitous God
450,000
9-10 (max)
16x Philosophies of Praxis
1x Crown of Insight
700,000
6
1
1,652,500
18
3
4,957,500
Talent Books - Praxis
Every character’s talents will require a specific talent book, and Collei’s are the Praxis series. These books can be found in the Steeple of Ignorance domain, but only on Wednesday, Saturday, and Sunday.
Trounce Materials - Tears of the Calamitous God
Though most of Collei’s ascension and talent items can be found in Sumeru, she’ll need to take a quick jaunt over to Inazuma for her trounce mat. This is the item called Tears of the Calamitous God, which is a drop from the fight against the Shogun in the End of the Oneiric Euthymia domain.
This domain is only farmable once per week, and isn’t available until the player completes the second chapter of the Raiden Shogun’s story quest. This quest is titled Imperatrix Umbrosa Chapter: Act II - Transient Dreams.Check out our quest walkthrough here.