Firstly, no one in their right mind would wield a blade of a about 20 meters tall.
Secondly, no one above the Super Soldier level could New ancient Undead alternate dimension without triggering the dimensional restrictive laws which meant that a Super soldier had left that mark.
Thirdly, the highest level of strength a Super soldier should possess is limited. Granted they could shatter the entire building with their full strength. However, making such clean cut about half a hundred meters without shattering the building itself was impressive.
Such level of control, impressive comprehension of the sword skill and technique. No doubt the person was a FiendGod candidate.
Another potential Fiendgod?
'Facinating.'
At the topmost floor of the building, the wind howled crazily as mist and vast clouds surrounded building's peak.
Tyrion muttered, holding a single crimson vein that wriggled within his grasp like a worm.