Better end has an enchantment for helmets that prevents enderman aggro, like a carved pumpkin. Carved pupmkin doesnt activate enderman head but the enchantment is ignored. it would be cool if it worked on the heads too

Can you give me it's Id?

the enchantment?

how

What shows up with the enchant command + mod id

betterend:end_veil

enchantment ID.

after having had a look at it they should kind of implement IForgeItem::isEndermanMask to check for their enchantment on all items via mixin. thats the most general solution that would work with all mods