"Sorry, I think I'm lost here.  My impression is along the lines of - an Uncreator can in principle walk up to a giant force dome that's held up a flying city for a thousand years, and blank out the enchantment's protections and the enchantment and the enchantment repair system and the enchantment security protection until your flying city falls out of the sky.  Only they don't actually do that, because people who can reach Tier 4 aren't usually giant fucking vandals who'd rather destroy an ancient flying city than make incredible amounts of money."

"Sorry, I think I got lost on an earlier step of this conversation and didn't make it to the current sentences.  My impression is along the lines of - an Uncreator can in principle walk up to a giant force dome that's held up a flying city for a thousand years, and blank out the enchantment's protections and the enchantment and the enchantment repair system and the enchantment security protection until your flying city falls out of the sky.  Only they don't actually do that, because people who can reach Tier 4 aren't usually giant fucking vandals who'd rather destroy an ancient flying city than make incredible amounts of money."