Calliope's Teather

This spell creates a magical chain linking a creature within range to either another creature or an object within range. Choose either two creatures, or a creature and an object. Unwilling creatures must make a Dexterity saving throw; on a successful save, they're unaffected. If the chain links two creatures, and one succeeds it's saving throw, you can choose to link the chain to an object within range instead.

The chain's length is slightly longer than the distance between the two targets. The chain is immune to nonmagical attacks; otherwise, the chain has 10 HP and an AC of 10.

Creatures bound by a chain attempting to move to another plane of existence must succeed a Wisdom saving throw to do so.

At higher levels. If you cast this spell using a spell slot of 5th level or above, the chain gains an extra 15 HP and 2 hours of maximum duration for each level above 4th.