Wacko Beacons

What is the essence of this modification?

A conceptual vulnerability in Minecraft is demonstrated that allows players to obtain beacon effects of level 2+ and regeneration level 2 using only a first-level beacon. All of this works exclusively on the client side.

How is this result achieved?

Second-level regeneration system

Minecraft's beacon mechanics have a peculiar architecture: there are two independent effects - primary and secondary. The secondary effect can be identical to the primary one, but the server side does not validate their compatibility, only ensuring they belong to permitted beacon effects. When both effects match, a level II effect activates, although Mojang additionally verifies the presence of four structure layers on the server. Thus, the described method is applicable only for obtaining second-level regeneration.

The client modification consisted simply of adding regeneration to the list of primary effects.

Resource savings

It was discovered that despite checking effect availability, the system does not confirm whether the effect can be obtained at the current beacon level. This allows, for example, activating strength level I for only 9 diamond blocks instead of the standard 50 - significant resource savings.

Implementation was reduced to activating all interface buttons on the client side regardless of the current beacon level - technically not a difficult task.