this earing would be semi-useful during a fight with maat, its said that the best jug pet to use is the HQ beetle, so having this earing equiped after u enter gives u an edge against his pet. i wouldnt equip it before entering though, we wouldnt want him having the same effect on your pet!
Well, I think these are for bst and don't really seem useless. I'm not a professional BST, but it seems that if a BST could get a whole set of these "killer" earrings, they could swap them in for the thing they are fighting based on their passives:
Vermin Killer Beast Master: 10 Single Gives you an edge when fighting vermin. Resist Slow I Beast Master: 15 Single Gives a slight resistance to the Slow effect. Bird Killer Beast Master: 20 Single Increases your damage against birds Amorph Killer Beast Master: 30 Single Increases your damage against amorphous creatures Resist Slow II Beast Master: 35 Single Gives a slight resistance to the Slow effect. Lizard Killer Beast Master: 40 Single Increases your damage against lizards Aqua Killer Beast Master: 50 Single Increases your damage against water based creatures Plant Killer Beast Master: 60 Single Increases your damage against plants
<Type of Monster> Killer doesn't do more damage. It randomly (I don't know the chance of working) intimidates the monster when you are fighting the correct type. Intimidation is the same as paralysis; it makes the monster waste its action. Hope this clears it up a bit.