By incorporating separately sold expansion parts, I recreated the heavily damaged Barbatos Lupus from the battle against Hashmal. The greatsword, forcibly borrowed from the Helmwige Linker, is ridiculously huge. Since attaching parts like the eyes requires disassembling the model, I think you'll need two kits – one for this configuration and one for the normal form. (Building another one will require quite a bit of effort…)

MG Barbatos Lupus (Awakened) | shin's Gunpla works