Loki made Thor exactly three promises in their lifetimes. The first two brought him back to his brother. The last took him away.
(Or, the three times Loki told the truth and the one time Thor wished he had lied instead)
Thor/Loki, implied relationship, canon divergence in that Loki escapes from Asgard in between Avengers and TDW, major character death, which is pretty obvious in the description, but in case it wasn’t, it’s also based on this artwork by wantstobelieve and the title is from this quote from Lauren Oliver’s Delirium Stories:
“What glitters may not be gold; and even wolves may smile; and fools will be led by promises to their deaths.”
Also inspired by a quote from Melodie Ramone’s After Forever Ends, "It seems unnatural being raised together and then dying apart."
Posting this on the side blog.