Damn you, Blogger

I spent a good three minutes typing up a comment here and as usual, Blogger eats my comment.  Arg.

I was gonna say:

I like the one-and-only summoned being idea.  I’d connect it to the infernal/celestial being’s true name.  You learn the spell, you learn one true name of a creature, and if you want to summon a different one, you need to find another name to use.  This also would make wizards very reluctant to sell a copy of their spell, as now someone else might be “using” their little extraplanar buddy or “tying up the line” when they want help!  Maybe a swindler will sell you a spell with an invalid or  wrong name.  Maybe a demon named “Insert name here” is terribly overworked and tries to get the party to collect all known copies of the spell with his name in it, for a reward or whatever.  And scrolls with a few true names would be desirable treasures.  (Sure you know “Summon,” but all that doofus you learned it from knew was the name of a celestial muskox and you’d really like to be able to summon up a celestial peacock or whatever.)  Then again a really old scroll might only have the names of now-dead-as-in-killed-on-their-home plane-and-really-really-dead creatures.  You should run with this idea…