While benign by itself, a dangerous, intelligent carnivorous entity, apparently similar to a large spider, and possibly similar to the [[Silver Nooses]] was apparently using the rift to capture the left path duplicates, subduing them and taking them to a cave for later consumption.
The Quantum Duplication Rift was also subsequently used by [[Noah Fulmer]] to create over two thousand duplicates of himself, along with armor and weaponry stolen from the [[Gemstone Hegemony]].
The rift itself was destroyed during the final stages of [[The Crushing Fist]], as later discovered by [[Ward Shaw (The Sword)]] and one copy of [[Noah Fulmer]] when they were planning to use it to duplicate a supply of food.