Sweeney was an ancient Irish god of the sun and king — and as he descends into the madness hallucinating Banshees, the foreshadowed of death, he comes to terms with his end and does it attempting to take out Wednesday, only to be speared through the heart by Shadow; unless you do something about it.

The peace in the greenhouse is broken by Mad Sweeney "Ah, surprise, surprise. Somebody forgot to call me down to dinner. Nobody's stopping you drawing up a chair. Except for the fact that there's no more fuckin' chairs. I'm feeling a bit like the 13th fairy, I have to say."

Sweeney interrupts their meal, asking if they can hear the banshees and again telling Wednesday he no longer owes him. He walks over to where Shadow is sitting with Gungnir and tells him to honor his promise. "I didn't spoil your appetite, did I, old man? Means I don't owe you anymore. Not a hair on my fuckin' arse." I turn to Shadow speaking lowly "Don't. Get. In. The. Way."

Shadow refuses to give Sweeney the spear while Wednesday has everyone else clear out of the room. Sweeney will not let go of the spear so Shadow headbutts him in the face. They start fighting, with Shadow getting the upper hand. Sweeney asks Shadow if he can feel Wednesday's poison, revealing that he caused Laura's death at Wednesday's bidding and that Sweeney also slept with Laura. Shadow demands Wednesday to tell him the truth, turning his back on Sweeney. Sweeney picks up the spear and charges at Wednesday.

You had come to consider Sweeney a friend, you knew he would not survive this, he had no intention to. But you had found his coin, you could fix this. You burst in just in time to see the spear thrown, Shadow already moving to Wednesday's defense