Ouroboros Flail

You can easily expand and contract the chain of this +2 greater striking extending war flail. It magically grows new links when extended and loses them when contracted.

Activate r command · Frequency once per hour · Trigger You successfully Strike with the flail while activating its extending rune · Effect The head of the flail wraps around the target of the triggering Strike and drags it in your direction. The target must succeed at a save or be pulled adjacent to you. A creature pulled in is then by the flail until the end of your next turn unless you move, your target Escapes (DC 31), or you use the flail.

Activate 3 Interact · Effect You extend the flail's chain, then wrap it across itself and strike two links together. This severs a usable 60-foot loop of chain from the flail, which instantly returns to its normal length. If you use this activation again, any previous chain you created with it disappears after 1 round. As with most obviously magical and temporary constructs, the chain cannot be sold.