The Spear of Longinus

The Spear of Longinus, also known as the Holy Lance, the Crucifixion Lance, the Spear of Gaius Cassius, etcetera, is an weapon and artifact that is said to have delivered the final blow to Jesus upon the cross. While it has little ritual behind its actual creation, its legend grew over the centuries, and it's still referenced (and homaged) in historical and pseudo-historical videogames as an artifact of Christendom.
== Notes ==
Note that Arthurian legends are often built upon Christian legends and artifacts, so it's no wonder why King Arthur and his Knights would be interested in this spear, among many other Christian historical items--especially if they're supernaturally empowered. 
== Legend Bits ==
The Spear is said to have been held by Constantine (~306 AD), Charlemagne (~768 AD), and Frederick the Great (~1740 AD). Some claim Napoleon Bonaparte (1804 AD) had it at one point. Some worldlines claim Hitler (1933 AD) got his hands on one.
== Variations ==
* The Spear of the NonbelieverSCP Wiki, The Ouroboros CycleMentioned more directly in this post -- A weapon that can even kill gods, but the user is bound to it until they perish.
* There's one in the Fate series but I'm not remotely familiar with it. 
== Inversions ==
* The Conspiracy Spear -- Spear is poisoned with a false-death tincture to fake a death, allowing the victim to be moved and healed (although you'd still need a miracle to survive the damage in the first place!)Warehouse 23, p.38-39