Valkyn Skoria shatters one of the large stone platforms he's standing on during the battle. Valkyn Skoria is 2.38m tall.
1 pixel = 2.38/170 = 0.014m
0.014m X 17 = 0.238m
0.014m X 1138 = 15.93200m
15.93200m/2 = 7.96600m
Volume as a cylinder.
V = πr^2h
= π X 7.96600^2 X 0.238
= 47.4468554m^3
The fragments got sent flying everywhere, so this is very obviously violent fragmentation (that being 69000000 joules per m^3).
E = 47.4468554 X 69000000
= 3.27383302e9 joules
= 0.7824648709369 tons of TNT
Final Results
Valkyn Skoria shatters platform = 0.782 tons of TNT