Hi its Nat!
this is an idea for a mod since I cannot exactly do it. Ok there is the nether right? well its kinda like hell.. so make a heaven, portal by harvesting clouds with a silver pick axe ( so make it special) and clouds are blocks that are white, around 70% transparent look like ice a bit. The heaven is full of AI's that can trade ect. they are also angels and there is God and if you do some quest for him he gives you a rare item to help kill the devil in the Nether who hides in a giant nether fortress!

In heaven it will look beautiful with kingdoms and villages and holy tree's (this will be a big project but very amazing!)