I presumed that the description would specifically articulate that it required the target to be living if it was intended to have such a limitation, but my DM determined the target must be living (which, of course, he has every right to do). I also agree that, as written, this could permit 2d6...
Trying to determine whether any target who is reduced to 0hp by the spear adds 2d6 temporary hp, or whether this only applies to certain targets. For example, would reducing an undead target to 0hp allow the player to add 2d6 temporary hp, or does the fact that it is undead prevent this from...