If you could make a spell ...

[riodekill]

harry would have really needed it in part 4

[The__Dividender]

The Chosen Captain

Pedestrus, will make furniture and the like walk around. More sentient than the ordinary Locomotor but less cool than Piertotum Locomotor

But there already is Treguna Mekoides Trecorum Satis Dee emotion_awesome

Or, if you want something more epic/awesome/cool/probably inspired the Piertotum....

Yes, those suits of armour will kick some Nazi butt. When I read about the Piertotum I actually thought briefly of this film (from the 70s! The heck?!) and the awesome Locomotion spell.

[Headmistress of Gallifrey]

illusio or illusion. It's kind of complex. All you do is point it at someone/something and concentrate at what illusion/disguise to put on them.

[Omi - Beautiful Alone]

A spell to torture my enemies...."Crucio"..! stare