Varys freezes a Burnish Snake and shatters it. The scaling on this will not be easy, but we can find at least a good segment of the frozen structure. Varys is pretty tall, so we'll need to scale his height. Thankfully, one of the artbooks does show the characters next to each other (I remember another, better, official height chart too, but can't seem to find it at the moment). Previously for Lio, I used the average height of an American man, that being 5 feet 9 inches, or 1.7526m (the below chart is from The Battle of Geekboat).
0.0102491228m X 222 = 2.27530526m
Now we have his height, let's use a cleaner shot of him to figure out the size of his head.
1 pixel = 2.27530526m/1399 = 0.00162637974m
0.00162637974m X 150 = 0.243956961m
Next to scale Varys to his Burning Rescue Gear...
1 pixel = 0.243956961m/123 = 0.00198338993m
0.00198338993m X 575 = 1.14044921m
At last, we can start scaling the size of the ice.
1 pixel = 1.14044921m/173 = 0.00659219197m
0.00659219197m X 509 = 3.35542571m
0.00659219197m X 671 = 4.42336081m
0.00659219197m X 1049 = 6.91520938m
0.00659219197m X 950 = 6.26258237m
0.00659219197m X 1419 = 9.35432041m
0.00659219197m X 181 = 1.19318675m
Volume of each segment as a rectangle.
V = lhw
= 3.35542571 X 4.42336081 X 6.91520938
= 102.637326m^3
V = lhw
= 6.26258237 X 9.35432041 X 1.19318675
= 69.8995073m^3
Now we've done that, time to scale all over again for the next part.
1 pixel = 1.14044921m/124 = 0.00919717105m
0.00919717105m X 177 = 1.62789928m
0.00919717105m X 130 = 1.19563224m
0.00919717105m X 728 = 6.69554052m
0.00919717105m X 604 = 5.55509131m
0.00919717105m X 161 = 1.48074454m
0.00919717105m X 659 = 6.06093572m
0.00919717105m X 643 = 5.91378099m
0.00919717105m X 503 = 4.62617704m
0.00919717105m X 250 = 2.29929276m
Volumes as rectangles once more.
V = lhw
= 1.62789928 X 1.19563224 X 6.69554052
= 13.0319916m^3
V = lhw
= 5.55509131 X 1.48074454 X 6.06093572
= 49.855264m^3
V = lhw
= 5.91378099 X 4.62617704 X 2.29929276
= 62.9045062m^3
There's more, but I can't find a proper frame for scaling for most of it. Let's add all those up for our volume.
V = 102.637326 + 69.8995073 + 13.0319916 + 49.855264 + 62.9045062
= 298.328595m^3
Ice has a density of 919kg/m^3.
M = 298.328595 X 919kg
= 274163.979kg
Given this ice froze a burnish snake, and burnish flames can melt not only ice, but also metal, and freeze flames? They should be at least 100°C (likely much higher). Specific heat of air at this temperature is 1.005 kilojoules.
E = 274163.979 X 1.005 X 100
= 27553479.9 kilojoules
= 27553479900 joules
We'll also add the heat fusion of oxygen of 13800 joules/kg.
E = 274163.979 X 13800
= 3.78346291e9
Finally, to add both of them together for our final result.
E = 27553479900 + 3.78346291e9
= 31336942810 joules
= 7.489709084608 tons of TNT
Final Results
Varys freezes Burnish Snake = >7.49 tons of TNT