More people to Minecraft

So I was thinking, adding more npc that the player can like interact like for a example villager or wandering villager I was thinking the player needs to find or built a structure, then the player needs to get, zombie creeper and the dragons heads and then Redstone soul sand in a T position then summon it dinner tested by sending waves of the undead after 30 waves it will decide and it depends on how much times to died for example, if he died more than 10 times you will fail minimum 5 then after alll of that you can trade nether right for like more op stuff