Hildskjalf he rules over poetry and wisdom, and will be killed by Fenrir at Ragnarock.  
He learned nine powerful songs and eighteen runes while hanging around for nine days.  Assisted by Huginn and Muninn, one of his eyes blazes like the sun. His ring multiplies itself by nine every nine days, and he consumes nothing but wine.  The mothers of his children include Jord, Grid, and Frigg. From his throne Hildskjalf he rules over poetry and wisdom, and will be killed by Fenrir at Ragnarock.  For ten points, name this wielder of Gungnir and namesake of Wednesday, foremost of the Aesir in Norse mythology.
He learned nine powerful songs and eighteen runes while hanging around for nine days.  
{Odin} (accept {Othinn}, {Wodan}, or {Wotan})