We see Noh-Varr give a piece of stone to Annie in Avengers #26. It starts glowing and levitating in Avengers #27, when Noh-Varr is
under attack by both sides for betraying both the Avengers and the Kree.
What is this? Are there any educated guesses that could be made, given it isn't described in the Avengers (despite Annie's repeated questions)?