Terrako's Return

is a quest in.

Overview
Terrako's Return is located in Central Hyrule, to the west of Hyrule Castle (Breath of the Wild)

Terrako's Return is unlocked after the final Scenario, The Future of Hyrule, is completed. The quest requires 50 NaN links to complete, which can be acquired in various quests and NaN links. After all 50 are collected, a secret cutscene will play, and an alternative ending sequence will play, featuring Terrako traveling around Hyrule while meeting various characters, in an art style similar to the Loading Screen of the game.

After that, Terrako becomes a playable warrior with a starting level of 57 as well as a Blessed Screw with the default attack damage of 11. A new set of quests focusing on upgrading Terrako will be unlocked and Terrako's Training will be available to the player also.