Bag of Endless Caltrops

As an action, you can open the bag and spread caltrops to cover a square area that is 5 feet on a side. If these caltrops cover more than 500 square feet of area, the oldest excess caltrops will disappear in 1 hour. 

The caltrops created are magical and deal 1 magical piercing damage, but otherwise, follow all the rules for normal caltrops. If an anti-magic field or similar effect is imposed on the caltrops, they become mundane caltrops until the condition ends.

Notes: Speed Reduction: Impose