Make Wooden Mansions the only place to find Totem's of Undying

Right now there is no real reason to go to a Woodland Mansion in my opinion. All the chest loot is ok but easy to find in other places and all the rare mob drops can be gotten in raids.

I think Evokers should not drop totems in raids to make the Totem of Undying a rare item again and make the Woodland Mansion (one of Minecraft's coolest natural structures) have a reason to go there.

This could be done by making Evokers that spawn in raids be a slightly different mob that does not drop totems.