In a time of myth, when Vikings ruled the land, when their berserker rage went unmatched by anyone who opposed them. In this fierce and merciless time, the legendary warrior Rainulf the Wraith-Stalker is summoned by the granddaughter of a dead king to best a deadly enemy. But this enemy is unlike anything Rainulf has ever faced. In the dense, cold mists of this ancient land hides an invincible creature born of the Underworld -- with iron skin, dagger teeth, and blood that burns stone -- known in the far-flung future as an Alien.
Originally published in Dark Horse comics as a one shot comic this 22 page story is now a property of Marvel after the acquisition of some Fox's properties by Disney (at least as far as I can tell by my limited research.) I am sure those that might consider reading this comic already understand the dark content often associated with the franchise so don't be surprised by the potential death count even though this is a normal length comic at the time (of course the Parental Advisory warning on the cover is a good sign too.)
Set in the past during the time of Viking influences across the known world we see a band of warriors on the hunt for the vile crawler known to return every 50 years to pay back the blood of the man who almost killed it once before. Now his descendants and a man raised since he was an infant to hunt the creature are on the trail to end it before the creature can complete its revenge.