Xered, Gatekeeper of Itheria

Flying
If Xered, Gatekeeper of Itheria dies create
a 0/1 blue egg token with "At the end of your
next turn you may sacrifice this token, if you do bring Xered, Gatekeeper of Itheria from your graveyard to your hand."
No one shall cross the gate of Itheria!
-Xered, Gatekeeper of Itheria