Well, Mikhal, the answer to your questions:
I really don't care.
It could be infinite pages long for all I care about this item.
But the blood-writing, I would figure yes, because its a ritual thing. Go to Comment
I'm just not sure what I should do for his past. Use your imagination. Make somethin' up. Oh, and it has to have something to do with the sunken peninsula (See Unnatainable Glory Plot) Go to Comment
Wow. All good. Perhaps it should communicate. It couldn't cut bread or do anything like that because when you remove the blade from the sheath the detonation occurs. Maybe the range could extend. If you don't want peace you can't pull the sword from the sheath. Go to Comment
The point is that you're not supposed to draw the sword.
It destroys the user and everything around them, by a variable distance, so chances are, if it's connected to legends of peace as in the story of the sword, the drawer may end up destroying everything they wanted to save. Go to Comment
The players see a small shrine to the local nature deity just of the trail. Before they even approach it, they can smell the foul stench of rotting meat. If they inspect the shrine, they can see it has been desecrated by rotting organs in the last few days. There is no mistaking it for an obscure ritual, the organs are thrown everywhere, not left in specific places as in sacrifice.
If the players try to clean the shrine, they will soon find it has been boobytrapped to fling sharp splinters covered in the rotting gore in every direction. While only doing a few points of damage, they injured players will likely take sick soon unless they get medical attention.