Animated Chain

A small golden chain, which could be used as a necklace or bracelet. It lengthens into a large chain up to 20 feet according to the owner’s thoughts. The rope can do one the following as an action:

• Coil beneath the owner and raise them up 15 feet
• Coil like a spring beneath the owner and launch them up to 40 feet in any direction (can be used as transportation, making your speed 40 ft.)
• Entangle a creature. If the creature’s size is small, it is automatically restrained. If the creature’s size is medium or larger, it makes a strength saving throw. The owner rolls a d20. This roll becomes the DC. If the the creature fails the saving throw, it becomes restrained. At the end of its turn, it may make a strength check against the same DC to try to escape. When a creature is restrained, it can be moved as an action up to ten feet in any direction, including up. Alternatively, it can be thrown up to 20 feet up or 30 feet sideways. When thrown, it becomes unrestrained.
• Be used as a +1 whip, but with a 20 foot range. Make a magic melee attack. On a hit, the target takes 1d10+1 bludgeoning damage.
• Coil into a shield on the owners arm. 

The chain can carry up to 500 lbs., and cannot be broken by most means. The DM decides whether it breaks from different situations. If the chain loses direct contact with the owner, it instantly shrinks back into a small chain, and tries to slither back to the owner like a snake. If it is blocked by an obstacle larger than 6 inches that it cannot get around, or is in an enclosed space, it gets as close as it can to the owner. This can be used to track the owner.