I'm a level 24 wood elf and I was riding shadowmere to a quest and I rode straight up a mountain and found a word wall and after I got the word a dragon priest came out and this dog was following me for the quest and it didn't die because it belongs to a dradric prince. Okay right I hear that dragon preists are level 50 Wich is awesome considering the fact I killed it but shadowmere must either really tank or invincible because it was taking all the damage while I put arrows into the preists face sooo what I'm asking is if shadowmere can actually die?

jump him off a cliff and you will see.

He can die, but its tough since he regenerates health REALLY REALLY fast.

You can see for yourself by attacking him.

Learned this the hard way.
I NEED TO SLEEP NOW.
It's like 3 in the morning. :C
I haven't slept this late since FO3