Cloud of the mundane

A ever shifting cloud sweeps up 1D20 items small objects and drops them on command (the objects are treated as charges). Each charge expended deals 1 point of damage. The cloud has a movement speed of 15ft. Unless commanded not to do so the cloud will use its turn to go the nearest player that means harm to its caster. The caster can command the cloud as free action. If the cloud has no charges left then it will rain into nothing. If a creature is loses 5 hit points to the cloud it is knocked cold losing 1D4 temporary constitution points each round until woken.