In Norse mythology, Frigg overlooks mistletoe when securing oaths to protect Baldr.
Frigg asks the beings and things of the world to promise that they will not harm her son Baldr. She considers mistletoe too young or insignificant to pose a danger, so it is excluded from the oath. Loki notices this weakness and fashions a projectile from mistletoe.
The blind god Höðr then throws the object at Baldr during the gods’ game, killing him. This story explains why mistletoe became central to the myth of Baldr’s death. The surviving accounts do not describe a conventional arrow in the modern sense; translations vary in how they render the weapon, including dart, missile, or projectile. The important detail is that the overlooked plant makes Baldr vulnerable.