Enlarge

You spend 10 hours concentrating on absorbing the natural magic of the giant item and push the magic into a creature within reach.

Enlarge. The target's size doubles in all dimensions, and its weight is multiplied by eight. This growth increases its size by one category-- from Medium to Large, for example. If there isn't enough room for the target to double its size, the creature or object attains the maximum possible size in the space available.