Minecraft should add defence block

The defense block can be obbtianed by putting iron and obsidian  gunpowder this would make another use for gunpowder than just tnt and this block would protect in a area the area would be marked with enchanted end crystal with can only be destroyed by the owner and allow people to enter this would make a way to protect your base and allow friends to come in without harm and others might die this would be really useful to protect your base it can be crafted bye putting the obsidian in the middle gun powder on the right side of the obsidian and the rest gold