Barrelmancy

Upon use of this spell, the container becomes magical and is immune to all nonmagical attacks barring immunity to poison and thunder. The container cannot be used for further spells. You can use multiple containers, but you will need an extra pound of cheese per container. The center of mass of the container is at where the ground is unless stacked on top of additional containers, in which case the containers can be balanced on the ledge of the previous container.