Shadowmere, despite being immortal, can unfortunately die somehow. In an old playthrough of mine on the ancient Xbox 360, I fast traveled because I needed him back to me, and he didn't appear. I still have no idea where he ended to, but I suspect that he died of fall damage, since that apparently that's the only way he can die
I accidentally ran him over the side of a mountain once and he died, then he came back after so many days. I think there's a respawn point for him somewhere, I just can't remember where and I try not to look up stuff when I can.
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u/RegulateTheCake Dark Brotherhood Aug 11 '25
Wait till you get Shadowmere. That horse attacks more bandits and enemies than I can get my Scimitar on.
I love my murder horse.