This is true... but less fun. You've chosen a category of item where the clues can be very fun and interesting questions, where we can ask things like "does it have horns" instead of only game mechanic questions like "does it have a casting time." Next round I host, I'll probably pick a collectible too.
In general, the zones have two looted collect sets and two ground spawn collect sets. I will start with the zone eliminations. Is this item found in Cobalt Scar?