Trying to find a fic

[kelly spontenelly steele]

It's been driving me crazy all day but I remember this fic where either Stiles or Derek were stuck in some sort of time loop. When the time was up, Stiles died horribly in front of Derek but no one else seemed to notice or care. Maybe it was multiple universes? Not sure but I just remember Derek getting more and more desperate to stop him from dying. Thanks in advance for any suggestions!