It was a weird "Bigfoot and the Hendersons" type thing; all hair and static, that charged up in its sleep.
That monster was the Umpleby.
|"I just want a hug...but they all keep dying :("|
So, here it is for 5e. I've done away with the sleep charging thing, to keep it simple, but have otherwise done my best to keep to the original version and its 2nd Edition incarnation.
Hope you like it!!