A new set of Echo is available in version Luna I, and the characters are for Nahida and Yelan. Here's the guide to completing their puzzles in Envisaged Echoes.
Guides for previous characters:

Envisaged Echoes Challenge Details

To unlock a character challenge stage, you MUST fulfill the following requirements to begin the challenge:
- Character must be Level 90
- Character's Friendship Level must be at least 8
You can have up to 4 Keys of Echoes at once, but you will not be able to claim more keys at the limit. To avoid not being able to claim more Keys of Echoes, you can unlock character challenge stages first, then complete the challenges once you meet the requirements. After a challenge stage has been unlocked, you can challenge it multiple times.
How to get Key of Echoes

You can get up to 2 Key of Echoes per month by completing Imaginarium Theater challenges. Hard Mode will only give you 1 Key as it has 8 acts, while the hardest mode - Visionary Mode - has 10 acts and will give you both 2 Keys.

Envisaged Echoes Nahida Guide
Video Playthrough
Recommended Nahida Build



Nahida will be provided with a team full of Trial Characters in the challenge. The Nahida in your team will be your Nahida, so you need to build her properly before the challenge, while the remaining characters on the team (Xingqiu + Kuki Shinobu + Thoma) are the Trial Characters and cannot be changed to your own characters.
- Weapon: A Thousand Floating Dreams (5⭐) / Kagura's Verity (5⭐) / Wandering Evenstar (4⭐) / Sacrificial Fragments (4⭐)
- Artifact: Deepwood Memories
- Stat: EM | EM/Dendro | EM
- Talent: Prioritize Elemental Skill > Elemental Burst > Normal Attack
The following is my build that completes the challenge (in the video above), so you can use it as a reference to build an even better one:

Physic of Purity 1st Half
Challenge objective: Defeat as many opponents as possible within the time limit.
Special Rules:
- During the Physic of Purity challenge, the battle will be split into two halves. If you defeat 10/20/30 opponents in the first half, then the Burning, Bloom, Hyperbloom, and Burgeon reaction DMG all party members deal in the second half will be increased by 50%/200%/400%.
- During the first half of the Physic of Purity challenge, all party members will deal 50% increased Burning, Bloom, Hyperbloom, and Burgeon reaction DMG for 10s when Nahida deals Elemental Skill DMG to opponents. This effect can occur once every 1s. Max 4 stacks.

- You will start the challenge without any Energy, so there’s no Burst right off the bat. The rotation for the whole battle should be the same.
- First, use Nahida’s Hold E to mark all the enemies, then use Xingqiu’s Skill to trigger Bloom > Kuki Shinobu E to trigger Hyperbloom > and finally Thoma’s E for Burgeon or Burning.

- After the first or two cycles, your team should have enough Energy for their Burst. Afterward, you can use the exact same cycle, but add their Burst when you have enough Energy.
- If your Nahida is using a 4-star weapon, she should aim at least 20 opponents for the buff in the 2nd half.
Physic of Purity 2nd Half
Challenge objective: Defeat opponents within the time limit.
Special Rules: The Hydro Tulpa in the second half of the battle will summon 3 Half-Tulpas at once.

- Remember that you will gain a buff from the 1st half, depending on how many opponents you have defeated. You should try to aim for at least 20 opponents to get the 200% DMG increase for the Dendro reactions.
- In the second half, the rotation for the whole battle will almost be the same Nahida’s E and Q > Kuki’s E > Thoma’s Q and E (There's no Xingqiu here, and it will be explained in the next paragraph). It’s okay if some characters don’t have enough Energy for Burst, you can just use their Skill and wait for the next rotation for their Burst. The Tulpa has Hydro state for the whole battle so it’s easy to trigger reactions.
- But one thing that you need to pay attention to is when the 3 Half-Tulpas appear. Once they appear, you want to defeat them by using Nahida’s Hold E skill. Hold her E and do a 360 spin to make sure everyone will be marked. That is enough to defeat all the mobs to ensure the Tulpa can’t absorb them and power up.

- Tips for Xingqiu: As Hydro Tulpa is in constant Hydro state and immune to this element, you don't have to use his Burst. However, you can still take advantage of him in the second half.
- First of all, his Skill. Keep using his Skill in the rotation so the energy generated can be obtained by the next character.
- While for his Burst, it won't deal any damage, but it can do an i-frame and make you invincible for 1 second while using his Burst. You can use his Burst if the Tulpa is going to do some big damage or you're too lazy to dodge.

Envisaged Echoes Yelan Guide
Video Playthrough
Recommended Yelan Build



Yelan is the only character that can be used in her challenge, and she will use the build that you have (not using Trial Character). Thus, you need to build her properly before entering the challenge.
- Weapon: Aqua Simulacra (5⭐) / Elegy for the End (5⭐) / Sacrificial Bow (4⭐) / Favonius Warbow (4⭐)
- Artifact: Emblem of Severed Fate
- Stat: HP%/ER% | Hydro DMG Bonus | Crit
- Talent: Prioritize Elemental Burst > Elemental Skill > Normal Attack
The following is my build that completes the challenge (in the video above), so you can use it as a reference to build an even better one:

Valley Orchid Phase 1
Challenge Objective:
Complete 3 objectives within the time limit:
- Collect the designated number of Anemo particles within the time limit
- Destroy the designated number of targets
- Defeat the designated number of opponents


- Yelan's Phase 1 was very nicely structured as it was optimally positioned for the cooldowns of her skills. If you have her at C0, you can try to ‘cheat’ by using the Sacrificial Bow. Yes, the weapon needs you to use Skill on enemies, and the stage nicely placed a few Hilichurls along the way for you to take advantage of.
- But even without Sacrificial Bow, you can still complete this challenge without any problem because while you need to wait for her Skill CD to ends, you need to pop the targets in the air using her Charged ATK.

The shining bracelet shows that her Breakthrough is active!

Using her Charged Shot will deal Breakthrough Barb!
- Remember that Yelan’s Charged ATK has a special state = Breakthrough. She will enter Breakthrough state after spending 5 seconds out of combat (when there are no enemies to combat or if you switch to another ally), and by using her Skill on enemies.
- Breakthrough will cause her next Charged Aimed Shot to have 80% decreased charge time, and once charged, can fire a “Breakthrough Barb” that will deal AoE Hydro DMG. These AoEs are the ones that will save your time to clear the challenge within the time limit.
- You can see if she’s in Breakthrough by the bracelet on her right hand. If it’s shining, then Yelan is in the Breakthrough state. There’s also a mark above her head when the cooldown is reset by her skill.



- Once you reach 23 Anemo particles (aka at the end of the path), there will be two Hilichurls on the left and right side, and two sets balloons also on the left and right side.
- The best strategy to use here is using Yelan’s Aimed Shot on the balloons on left side first > Use Skill on all 4 Hilichurls to reset the Breakthrough state > Use her Aimed Shot once again on the balloons at the right side.
Valley Orchid Phase 2
Challenge Objective:
Destroy opponents within the time limit.
Special Rules:
During the Valley Orchid Phase II challenge, Elemental Nuclei will sequentially appear at the Pyro Regisvine’s corolla and roots. Destroy both these Nuclei to stun the Pyro Regisvine.

- Now this is the more challenging part, especially if you don’t have her signature bow, as her damage will go down a lot - it gave her 80% more Crit Damage after all. But as you can see in my video, it’s totally possible to complete the challenge with just a 4-star weapon (but still, make sure the build is decent).
- In this challenge, you need to defeat the Pyro Regisvine, but this one is pretty special compared to the punching bag in the open-world - You can only inflict damage on this boss after you stun them by destroying both corolla and roots.
- Yelan’s Aimed Shot play the most important role because those are the only attacks you can use to destroy the corolla and roots. Yes, you can’t use Skill on even the roots to inflict damage (But Ultimate can).
- Before starting, note that the Pyro Slimes will keep spawning and they’re here purely so your Yelan can refresh the Breakthrough state by using Skill on them and just to annoy you.



- So the plan here is, use your Aimed Shot (Breakthrough) on the corolla > Use Skill on Slimes to refresh the Breakthrough state OR you can just use normal Aimed Shot until the corolla is destroyed.



- Once the weakness moved to roots, the Regisvine will first scream and push you away from it first (not even i-frame can help you with this). So once you’re pushed away, immediately run to the roots (or use Skill), and use Ultimate. This will immediately break the roots and stun the Pryo Regisvine.
- Once it’s stunned spam Yelan’s Normal Attacks, Skill, Breakthrough state until the Regisvine comes back up and use the exact same rotation. Don’t forget to avoid any incoming attacks because Yelan can be thrown away and this will waste your precious time.



