[Batgirl Vol 1 #62]
A ghost! Or, due to retcons, a ghostly hallucination!
Actually, as an unrepentant Steph/Cass shipper, I kind of like this better as being Cass’s hallucination. It shows how she associates Stephanie with, well, death, but also with strength and not giving up.
“Do what you do best. What you taught me to do. Fight. Fight for your life. Right up ‘till the end…”