The sneaker would be a new mob that corresponds with other raid mobs.
It camouflages into a village and is undetectable to iron golems
It has an iron sword that it brings out when its is to attack like a vindicator, and it also prefers to target lone villagers.
It can spawn in/around villages or in raids.
And it drops a damaged iron sword, a 3:00 minute invisibility potion or an emerald.
It also varies from biome to biome to match other villages from the area.
Finally It only attacks the player once attacked, and it is only distinguishable via its different coat (look at the attached image of the model i made as an example).
Please can someone make this happen and message me if they have any inquiries.
It sounds like you want an invisible vindicator, that shouldn't be too hard to do and when I do my villagers/pillagers mod, I'll definitely consider it.
Cheers, but in my personally i think it should just be a vindicator with normal villager skin colour and a random timer to attack, and also when passive mimics villager pathfinding/ day cycle.