I've been thinking, along with poison, fire and all of the other elemental attacks, there is always room for more. In this case I would be talking about very common ailments in RPGs as a whole, such as:
Charm - makes the victim temporarily switch to the attackers side. Obviously ineffective on bosses, and I guess some powerful mobs. picture could be hearts. Would be good as a possible offensive attack from butterflies in t3 or even gremlin healers.
Horror (or whatever you would name it) - makes the victim flee in the opposite direction of where they were attacked. could make good use of spikes and thorns against players, while adding a way to thin out patches of enemies. would work well in graveyards.
Obviously possibilities grow when you included bombs guns swords and armor in the thought process. Who knows, maybe some armor could look a bit girlier (those pigtails from starter armors) and add some chance to charm.
whatcha think?
Charm Player side - would quickly trivialize arenas and large mob spawns, and make soloing much easier - ie not a big fan of it
monster side - it would mean adding AI for every possible knight in the event they are MCed and would be terrifying to face, for example im a bomber, do you really want an MC'ed gamegeared running around lighting you on fire, poisoning you and them blastbomb spamming you to oblivion in tier 3, or freezing you to let the enemy monsters beating on your frozen self to get to the squishy squishy knight core? And what about people with UVs like attack/charge speed, they would be a nightmare to have mced.
Fear player side - it would be nice to have on frost levels, but i could see resentment from other players that dont want some moron fearing mobs across the map. the only cc we need is frost, knockback and stun. any more and the game becomes too easy
monster side- would only cause player frustration. How would they inflict it? Bombs? spell cast? attack proc? these are important things because it affects its avoidability. But more importantly it would be terribly frustrating to get in a stage 3 arena or a trap filled level and get feared into a slew of spike flames and who knows what else.
If you dont know the effects of fear induced nerd rage please google onyxia wipe animation. that is what happens when you kill us all with fear.