Arthur Durability and Rhongomynyad power

Meanwhile, Arthur is searching for this giant boar, and it finds him. With his spear, Rhongomynyad, he manages to kill it, despite it being four tons, breathing lightning and very angry. Unfortunately, since he no longer has the sheath, he gets a tusk to the spleen and is bleeding all over the place. But he’s ARTHUR so he ignores that to start carving up the boar.

21st Century Guide to Mythology: Arthurian Myths Retold pg 64.