You are looking at a command called possess

possess {object}
Take control of another object and use it instead of your original player object.

eg possess the small white mouse

You can only possess objects you have created or unlocked objects

This object can only perform commands they have the ability to perform

WARNING: If you possess an unlocked object you will not be able to re-possess you original player objects so
you will have to logon to COW again to return to normal
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