Minor Grand Corruptor tweak

[reason]

He currently will only let you join him if you have learned 10 different spells.

I suggest that he should give you the offer instead if you have ~20 ranks of spells.

This would bring Corrupted Shell in line with other prodigies like Never Stop Running and Windtouched Speed, making it possible (though a little difficult) for classes which don't start with spells to get it.

[stinkstink]

It's already based on talent levels as you're suggesting.

[reason]

Oh, it is? The wiki seems to suggest otherwise.