I thought I'd just go ahead and calculate that block Raziel pushes. I don't know what material it is made of, but I am going to assume stainless steel. I will calculate this for those who live in NA and EU. I am also going to assume that this cube is not hollow. No one is certain of that either way, so under these two assumptions what I'm going to do will only be applicable if the cube is not hollow. This should be made known if this is to ever be used as a feat. So, I will start with the imperial system and then the metric system.

Imperial

Height of the cube: 8 feet (Assumption)

Material the cube is made out of: Stainless steel (Assumption)

V = (8 ft.)^3

V = 512 ft.^3

Stainless steel is 467 lb/ft^3

467 lb/ft^3 * 512 ft^3 = 239,104 lbs., or 119.55 sh tn.

Metric

V ≈ (2.439 m.)^3

V ≈ 14.51 m^3

Stainless steel is 7,480 kg/m^3

7,480 kg/m^3 * 14.51 m^3 ≈ 108,534.8 kg., or 108.53 mt

Note: It is important to understand that this does not mean that this is how much Raziel can lift, as this was never demonstrated.