How do enchantments with totem armor interact with End Hostilities?
The work about the same as normal.
Totem Armor is a replacement effect that replaces the enchanted creature being destroyed with the aura being destroyed instead (and all damage being removed from the creature).
When End Hostilities resolves, it wants to destroy all creatures and all permanents attached to them. This means it wants to destroy both the totem armor aura and the creature enchanted by it. Totem armor modifies that event to instead be that the creature has all damage removed from it and the aura is destroyed twice (or End Hostilities will try to destroy it twice, at least).
Yeah, that’s kind of weird, but that’s replacement effects for you.








