you go crazy and think you're Odin re-incarnate so you drink from what you think is Mimir's Well, to gain wisdom, but it's just a regular well with poisoned water and you go blind in both eyes. then you stab yourself with your own spear and hang yourself from a tree for nine days. after nine days, your bloated, decaying corpse is as dead as it was the first day. carrion birds tear at your flesh, and momma birds regurgitate what they've eaten into little baby birds mouths.