Context[]
From a young age, Kowl was infected by the Inky Blackness, an entity that sought out people feeling negative emotions in an attempt to cheer them up. However, it doesn't know how humans work and thus drives them insane with its cosmic nature. It's possessors however gain immense power as they adsorb a fragment of the Inky Blacknesses power. Kowl was cured from the possession before any real damage was harmed, but retained the power.
The power grew as he grew. In adulthood, his power forcefully reached its full potential when he was taken control by Akalabeth.
The planet is made of the densest metal found throughout the Guldan Star System.
The planet is slightly bigger than Pluto.
The Calculation[]
Radius of Pluto is 1,187 km
(4 × pi × 1,187^3)/3 = 7,005,526,273.16 km^3 or 7,005,526,273,159,999,488 m^3
Density of Osmium is 22,590 kg/m^3
7,005,526,273,159,999,488 * 22,590 = 1.5825484e+23 kg
Diameter of the planet is 68 pixels
The explosion 'radius' is 358 pixels
368 / 68 = 5.411764705882353
2,374 * 5.411764705882353 = 12,847.52941176471 km
Using the Alderaan explosion for reference since that's vaguely how in pictured it in my head.
Clip here: https://youtu.be/7g77WN6obk4
It begins to explode at 14:46 and enters its full explosive size at 14:62
So 0.16s
12,847.52941176471 km / 0.16s = 80,297,058.8 m/s
0.26c
http://www.stardestroyer.net/Empire/Science/Relativity.html
Yield: 5.393e+38 J
128 Ninatons of TNT