Help with my Favored Soul

Jonathan Arnold

I'm trying to homebrew a Favored soul for a D&D 3.5 game and I have a couple of questions.  First, which ability score do I use? Both Cha and Wis are mentioned,  Cha for the ability to cast spells and Wis for the spell DC. Second, how can I easily link the Clerics spell list to the Favored Soul since they use the same spell list?

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