Board Thread:Warhammer 40k General Discussion/@comment-37.152.33.225-20131108174133/@comment-8881468-20141009112514

guilliman survived in near absolute zero in the battle of calth

and as far as i remember, a mammal does have body warmth ( though we also could go on about the intelligence of fenrisian wolves, remember, "there are no wolves on fenris")

"Uniquely amongst the Primarchs he sported a pair of angel-like wings from his back, though whether this was by the design of the Emperor or a mutation caused by the high levels of radiation on Baal is unknown. He was also said to have psychic powers, especially the ability to divine the future"  counterqwuote from lexicanum... so pleaee be so kind as to give the direct source