Miniboss lair · Plains
Sealed Tower
1 Find
The Sealed Tower on the Plains (Hildir’s quest). Use Hildir’s Map Table to register the chest locations on your map.
2 Defeat 
Zil & Thungr
Zil & Thungr 
Good to know
- There are 3 towers in the world, at least 3000 m apart, at an altitude of 8 m and above, away from the edge of the Plains.