Ever wanted to protect your base from other players? Without plugins, mining fatigue is a great option. However brining a elder guardian to you base isn't very realistic and is a hassle.
Guardian Towers work just like elder guardians, but much better and takes less resources and time to set up!

Effects of Towers
Basic Tower: Mining fatigue II for 16 block spherical radius
Advanced Tower: Mining fatigue III for 16 block spherical radius (Elder guardian level)
Notes: There is a big difference between II and III. Also you will also get affected.

How to build
Basic Tower: Place down a prismarine brick. Drop a diamond on top of it (see first picture). Wait for smoke.
Advanced Tower: Place down a prismarine brick. Drop a diamond Block on top of it. Wait for smoke.
Warning: Advanced tower can take a while to remove

How to remove
Break the prismarine brick block. The diamond will drop and there will be smoke.

Hope this helps! More features to come