It seems unfair that only players can enjoy rich set additions, especially modpacks with hard core themes. its also fun if mob have their own set effect .
Besides, I'm experimenting with mob duels in my modpack with other mods.
I give them all some equipment and weapons, but there's no special bonus other than just armor and melee attack.
For vanilla creatures, like Blaze, there is a disadvantage in dueling because its ability to fire fireballs has not provided any beneficial bonus
So. can you create mob-special-set confirm?
This function prepares some abilities in advance. Players only need to make a Set that triggers this ability. When the mob gains the Set, it gains this ability
The ability i think of is :
*Enderman-teleporting : just let mob get Enderman's teleporting feature .
*Wither-skull: A mob which have special rang attack (such as Blaze)will summon wither skull when shooting .
*Ghastball: Same as above,will confuse players because looks like normal fireball
*Alchemy: all attack from the mob can deal poison，（Including the projectile like fireballs）

About other ability ,just do whatever you want to

Mob abilities are an interesting idea, but are something I'm avoiding for this mod.

I also don't want to implement set bonus detection for mobs, because it will drastically increase the computation needed to do inventory checks. Sorry!