Echoes of the Tower
A Protocol Space containing the unknown. Explore it properly and you might find some operator skill leveling items.
"And this is exactly why we can raise the Tower once more."
Dungeon Info
TypeProtocol Space
SeriesProtocol Space: Skill Up
Rec. Operator Lv.Lv.80
Stamina70
Mechanics
Enemies have more HP.
Enemies can take more Stagger.
Finishers deal much more DMG to enemies.
Enemies can take more Stagger.
Finishers deal much more DMG to enemies.
Enemies
Rewards
Operational EXP ×840 Operational EXP ★★★★★ Raises the Endministrator's Authority Level. 
Protoprism ×69 Protoprism ★★★ A material that upgrades operator skills. Overview › 
Protohedron ×14 Protohedron ★★★★ A material that upgrades operator skills. Overview › Tips on Defeat
1
In this Protocol Space, try applying Staggered quickly, then use Finishers to quickly defeat enemies.