So many wonderful pieces from you dude and so little time to comment on them all. v_v

I love the floating glyph on its forehead, the vain-like tubes coming from its head, elbow, and back, the cracks in the white armor with the pinkish flesh-like fell below, the gem protrusions forming the elbow blades and nails, and the way it looks both symmetrical and disorganized at the same time.

The runes on the right elbow's joint metal thing was a great touch too!

Using a prior character and sizing them down to show the scale of this colossus was a fantastic and needed touch.

This guy inspired me to make that into a monster the party (in the newly formed DnD group I am DMing.) will need to face. I hope that is okay.

I had another idea that when it drains enough blood (3 fire giants) then it can form huge bat-like wings made of blood that will allow it to fly. have fun with it :)

I hope my party enjoys it!