The entangler is a new smart contract that ties / entangles the original Exiled token with a newly created one. The new token has all new art and all new fixed metadata.
Holders have the option to create a link between their existing ape and the new art for a small fee. These tokens are from that point linked together through the entangler. The current owner or any future owner of either token has the option to exchange these back and forth for free. Only one token of the pair can exist outside of the entangler at any given time.