Peaceful Banner Enchantment

An enchantment that prevents mobs from spawning in a block radius. This would open up new build designs by allowing dark areas.

Possible balance areas for this enchantment:

1. Radius starts at 10 blocks but each enchantment level increases the radius.

2. Require more enchantment levels (50?).

3. Make it mob specific.

4. Instead of preventing spawns, it just reduces the chance.