Where to get this new look for Link.
Head to the northern entrance to kick off the chest containing the tunic.
From the In-Isa Shrine, head east towards the Zonai camp with the cooking pot.
On the way, you’ll probably bump into some Chu-Chu’s fighting Zonai Constructs.
The northern entrance and the Archaic Tunic is right beside this lake.
All the best exploring in Tears of the Kingdom!