Could be you’re thinking of Morlovia (not “Return to” …). It’s one of the Rare Quests; see 💫 Memento Rare Quests (Yes; as above.)
Could also be Knights of Avalon, where trap tools is one of the epic tier completion rewards: 👑 [Sep 2019] New Knights of Avalon Challenge Event – FAQ, Discussion & Summoning Results
… or Pirates of Corellia, where trap tools are among the legendary tier completion rewards: 🏴☠ New Pirates of Corellia Challenge Event – FAQ, Discussion & Summoning Results
… or possibly other challenge events? Sheesh, is there a master list somewhere? 
ETA: Come to think of it, Return to Morlovia also had trap tools as one of the rewards at advanced level 10 …