Sentient Spells

Sometimes through accident or strange purpose, a spell acquires sentience, personality and it's own goals or desires. A sentient spell can be scribed into a Magic-User's spell book. (it may already be there when it becomes sentient)  When the Magic-User attempts to cast the spell he or she must convince the spell to create it's effect. This will generally require the M-U to acquiesce to the Spell's requests. When a Sentient spell is encountered or created it's desires/goals should be determined. It will take at least one round to discuss the casting with the spell. The following modifiers should be applied to the reaction roll:

Roll 3d6 Take Highest 2 dice	If the M-U provides the spell with it's desires.*
+1/level lower	If the spell is lower than the highest level that the M-U can cast.
Roll 3d6 Take Lowest 2 dice	If the spell is greater than that which the M-U could normally cast.*

SENTIENT SPELL REACTION TABLE
2d6	Reaction:
2	Refuse and demand
3-5	Argue and request
6-8	Debate or concede 1/2 spell effect
9-11	Concede spell effect
12	Spell effect x2

1d6	Spell's Appearance:	Spell's Initial Method of Arguement/Debate:	Spell's Desire:
1	invisible	Charm	Freedom. If granted the spell may be erased from the caster's spellbook.
2	warm glow	Con
3	shadow	Sulk/Complain	Life Energy. If granted decrease caster's or victim's Hit Points.
4	crackle of electricity	Blame
5	vague, ghostly animal	Veiled Intimidation	Magic. If granted delete magic items (permanent) or spell slots (temporary).
6	inhuman, alien creature	Open Threats

*If a Magic-User attempts to cast a sentient spell that is of a greater level than he could normally cast and he provides the spell with it's desire, then roll 2d6 as normal.

I have not used this at the table yet.  It will probably change a bit when I do.  The above is what I would tell/show the Players. What I wouldn't say (at least not at first) is that stringing the spell along is kind of what this is all about.  Saying you'll give it what it wants, but putting it off.  Also the degree of freedom/amount of HP, magic items or spell slots is deliberately vague.  What ever the spell can convince the M-U to give it is what it gets!