FSang18's Power from Wisdom

In this Palladium addon, you can grow stronger each in-game day you survive.

Everyday, at the in-game time 100, you will grow older which can be indicated via an in-game VFX as well as the attached SFX, which grants a +0.25 do your Max health, and a +0.1 to your max attack attribute. This means every 4 days, you'll gain +1 to your Max Health, and every 10 days, you'll gain +1 to your max damage output.

To enable this system, you'll just need to set the gamerule "AddFSangAge" to true. If you are in-game, exit, then re-enter. If it is a new world, you should start with the power automatically.

Once enabled, you should be able to see the clock icon labeled "Powers" in your inventory screen:

This menu, when clicked, will show your current age in minecraft days, as well as your current Health and Attack modifiers:

Dying at any point will reset your age back to 0, however (with cheats enabled) using the command: "/FSAge" can get / set / add / remove age from player(s).