Name inspired by Merton. The goal of this challenge is to complete dungeon fights using a gear in which every charm is unique; that is, THERE CAN ONLY BE ONE copy of any given charm. In the case of group dungeons, there can only be one copy of a charm across all players (npc allies excluded of course).
Some fights may not change much under this restriction, but I think others might be drastically harder when you can't rely on multiple copies of some charms (I'd really like to see a hatred 3 Highlander run, for example).
I'll compile a list of any fights completed in this way into this post. Replays would be nice, but aren't required unless the fight is stupidly difficult. I wouldn't mind seeing some low-level fights completed Highlander style, provided they're done near the dungeon level, so feel free to post stuff under level 40 as well.