I feel great, I just tricked a Deadric lord.
Slight spoilers for a small mission perhaps.
In the house of horrors mission, before you're supposed to beat a poor old man to his death to give his soul to the Deadra, I conjured a soul trap on him, so I snatched the soul. The Deadra later says he's going to Oblivion to pick up his soul, but I stored it in a gem.
Surely being used to enchant a shield is better than being a slave to some Deadric arsehole, right?