A brave new void

My idea is to add an actual dimension for the void if you fall in and somehow survive the life draining fall you enter a world with dark noxious mushrooms as tall as dark oak trees. The only peaceful mobs would be similar to villagers but seemingly made out of the mushrooms themselves. The hostile mobs would be similar to the warden in strength but would be something resembling a dragon crossed with a mushroom. there could be new ore in this world allowing for void and fire resistant armour. There would be a portal you could make in the end with endstone and activate with a block of redstone that would teleport directly into this new world. Drop any ideas you have for this in the comments below. Bye!