I walked into Ichcahuipilli’s Aegis expecting a standard Natlan scrap. What I got was a boss that keeps tapping my team with Dendro attacks and, every time its HP drops to certain thresholds, yanks us into a separate dimension. It is one of the Night’s Trials scattered across Natlan in Genshin Impact, and in 2026 it remains one of the region’s most interesting achievement hunts. You find a lonely Obsidian Totem, press it, and the fight begins.
The core mechanic is simple until it isn’t. Inside the other dimension, you fight Nightsoul warriors. Each one you defeat gives you extra damage against the boss. The catch? Your HP starts depleting quickly, and the more warriors you cut down, the faster that drain becomes. It is a nasty little trade: power now, health later. If you are not chasing achievements, bring a shielder and let them absorb the incoming damage. You can also wait a few seconds and leave the dimension without killing the warriors. You lose the damage bonus, but you also avoid the HP drain. Honestly, that is the relaxed route.
For achievement hunters, the fight splits into three clean targets. The first is easy: defeat Ichcahuipilli’s Aegis. The second asks you to defeat 10 Nightsoul warriors inside the other dimension. That one is rough because the HP drain accelerates with every kill. I packed overpowered off-field healers and kept healing active while my main damage dealer rushed the warriors. The third is the real test: defeat the boss without being hit by any of its attacks. You cannot lean on a shielder for this one. You actually have to dodge. So, good luck suffering for 20 Primogems—that is the running joke, but the achievement is real.
Here is how I would plan the three runs in 2026:
| 🏆 Achievement | ⚔️ What to do | 🛡️ Team note |
|---|---|---|
| Clear the Trial | Defeat Ichcahuipilli’s Aegis | Any comfortable team; a shielder makes it calm |
| Ten Warriors | Defeat 10 Nightsoul warriors in the other dimension | Off-field healers are mandatory in spirit; keep healing ticking |
| No-Hit Clear | Beat the boss without taking a hit | Off-field damage like Yae Miko, Kokomi, and Nahida lets you focus on dodging |
The location is straightforward once you know where to look. The Special Obsidian Totem sits in northern Natlan, north of Huitztli Hill and right above the Goldflame Qucusaur Tyrant boss. I marked it on my map, flew down, and the totem was waiting patiently. If you have been clearing Natlan’s Night’s Trials, this one belongs on your list.
My biggest takeaway is that Ichcahuipilli’s Aegis rewards preparation more than raw damage. The dimension mechanic is not there to waste your time; it is a dial you control. Kill more warriors for more damage, or leave early for safety. The boss’s Dendro attacks keep pressure on, and the no-hit run forces you to actually learn the patterns instead of hiding behind a shield. In 2026, with Natlan’s roster and artifact options wider than ever, the fight is still a fun puzzle box. Bring a healer, bring a shielder for the casual clear, and bring patience for the no-hit attempt. The totem is not going anywhere.