Light faction mechanic tied to the "Bane of _____" series of enchantments.

I think Minecraft is already close to having something like this. Basically, there will be multiple hidden factions in the game with at least one enchant used to fight against mobs of a faction. Each faction should also feature one boss or rare mob/npc. There is already Smite that is used against undead mobs with the Wither acting as a boss for that faction. There is bane of Arthropods for spiders, silverfish, and their variants but lacks a boss. You could also make it so that some mobs are not solely part of a single faction. While dolphins and fish are a part of the underwater faction, and iron and snow golems are a part of the construct faction, guardians and elder guardians can be a part of both factions taking more damage from both bane of the sea and bane of steel yet not as much damage from mobs that solely belong to those factions. Maybe even spider jockeys can, despite still being separate mobs, both be apart of the undead and arthropod factions.