I have found recently that the nether star isn't anywhere near as useful as it should be considering how difficult it is to get it. Especially since the wither causes so much damage to your world, even more so if you die in the fight. So, here is my idea for the nether star
My idea is an item which is a type of compass called the death compass. It is crafted like this:
where the golden apple is the nether star. This compass functions as the opposite of the normal compass. While the usual compass points to your spawn point, this compass points to the last place you died.
Agreeing with the two above posts, the death compass idea is really good. The spirit world one is interesting too, but it'd probably be a hassle to put in. Plus, if you die in a certain part of the real world that has its corresponding area in the nether right above a lava lake (or if you're above y: 128 in the real world when you die), that won't be too fun...
The death compass actually sounds pretty cool because if we die with most of our valuable stuff, we can get it back instead of rage-quitting. The Spiritworld sounds kind of boring, people would get tired off it too fast.
I like the idea! Yet, it's kind of cheap to have them be kept with you when you die, then again it wouldn't be much of a help if you just died and lost the compass, you'd have to be smart and keep it in a chest, then get the compass out after you die...
I really like the idea of a death compass. Only thing I disagree with is that you can keep it on you even after you die. I think it would be one of those items you'd store away safely until you needed it.