Hod

Loki tricks Hod to shot Baldur

Also known as Hodur, in Norse mythology, Hod was the god of darkness and winter, the blind brother of Baldur. It was Hod who threw the mistletoe (guided by Loki) which was to slay the otherwise invulnerable Baldur. For this crime, Odin and Rind gave birth to Vali specifically so he could kill Hod.