Nanomachines, Son! is a Genshin Impact Wonders of the World Achievement that can be obtained by defeating the Jadeplume Terrorshroom while it's unleashing a powerful skill. Before attempting to get this Achievement, make sure that you have access to the Jadeplume Terrorshroom northwest of the Sumeru rainforest and have an Electro character on your team.
How to defeat the Jadeplume Terrorshroom while it's unleashing a powerful skill in Genshin Impact
The key to this Achievement is understanding the Jadeplume Terrorshroom's attack pattern. It has a Rage meter that fills up when it comes in contact with Electro. Once filled up, the boss will begin thrashing around, unleashing powerful strikes before giving up and falling to the ground. With this attack pattern in mind, your goal is to defeat the boss in the small window after filling up the Rage meter and before it falls to the ground.
The best way to guarantee this Achievement is to avoid using your Electro character until the Jadeplume Terrorshroom's HP is around 30 percent or lower (depending on your team's strength). Once you've shredded most of its HP, start attacking the boss with Electro to fill up the Rage meter. This way, it will start unleashing powerful attacks when its HP is very low, guaranteeing that you defeat it before it falls to the ground. If you successfully defeat the Jadeplume Terrorshroom within this small window, you'll get the Nanomachines, Son! Hidden Achievement.
Check out our guide on How to get The Smell of Grilled Mushrooms in the Morning Sumeru Achievement in Genshin Impact to unlock another Jadeplume Terrorshroom Achievement.