If you have knocked out a mob, you can try to tame it. If
you succeed, the mob will act as if charmed and aid you as pet. You
can't tame sentient beings, undead or mobs that are at least somewhat intelligent.
Store & fetch allow you to deposit your pet in special kennels. This
will cost you some gold. The more, the longer it takes.
Syntax:
tame <mob>
store <pet>
fetch <pet>