Saeviomagy said:
Not really suitable for general consumption though, because it's extremely abuseable.
It wasn't in our game, but then, we're weird.
I'm also not entirely sure what makes it all that abuseable; the xp spent on a permanent spell isn't extra or free xp, it's xp that you earned the same way everyone else earned theirs. The only difference is that instead of using it to gain a level or spending a relatively tiny fraction of it to build a magic item (which others might be able to use), you're taking a ridiculously large portion of it and saying "as long as this spell is up, I don't have this xp."
If someone dispels it, yeah, you get the xp back, and that's not as bad as the rules-as-written where it's gone forever. I guess you could say "Oh well, I guess I'll just gain a level with these experience points I got back" instead of saying "I'm going to wait until tomorrow and re-permanency that spell." But in practice, we didn't see that happen. Everyone who wanted a permanent spell
wanted a permanent spell. They were already willing to set themselves back, xp-wise, from the rest of the party in order to have that spell. Suddenly getting the dispel-magic rebate just made them angry because it deprived them of their permanent spell for the rest of the day, and forced them to recast it all in the morning.
And I'm not even sure why it would be abusive if they
did decide to gain a level from the xp rebate, actually.
I guess in comparison to investing those experience points in an item (which might be destroyed or stolen and would not be giving you any xp back if that happened), it's a better deal. But then, the balance there seems to be that you have to build something like ten to fifteen separate items before you've spent the same amount of xp that one permanent spell effect might cost you, and you can pass those items around or sell them to anyone else at your discretion. Lord knows our wizard with the permanent
see invisible complained enough times about being the only person who could see the invisible opponent when it would've been far more useful if the fighter or the rogue could've seen 'em, and our rogue was constantly wishing that he could get some permanent spells of his own.
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and it was 3.0, so any difference in earned xp was minimal and divided among the group