This mod allows you to use datapacks to attach custom attributes to mobs and items. You can configure all sticks to give extra max health when held in the offhand, or cancel the knockback resistance attribute on netherite gear, or increase the base armor stat of a mob by a random amount! It's primarily intended to provide a cleaner way of implementing attribute modifiers from Project: War Dance and Cloak and Dagger, although it works perfectly fine by itself.
For an example datapack, see the Github.
Icon is, again, taken from Lorc's game-icons.net.