List of spells

[elkston]

To cast tier 1 spells you need 15 Int for Elemental and 15 Wis for Divine.
To cast tier 2 spells you need 20 Int /or/ 20 Wis. [Elemental / Divine]
To cast tier 3 spells you need 25 Int /or/ Wis. [Elemental / Divine]

An interesting distinction for those who truly want to optimize their chars: The attribute requirements listed here are only for learning the spells. Once the spells are in your spell book, the only thing that matters (or at least is CHECKED by the game) is your Divinity/Elemental level. This means that you can wear items to temporarily boost your Int/Wis just before learning a scroll, then put on your regular gear and continue to cast the spell successfully.

As a Ranger, I continually cast tier 2, level 6 Divinity spells with only 18 Wisdom. I only put on my hat of +2 wisdom to get them in the spell book initially.

[Slarty]

Yeah. And just to clarify, this means that with items, you need only 13 INT to cast all Elemental spells, and 17 WIS (if you kill Xed; 19 if you don't). Since the third level divination spells are pretty irrelevant, you can really get away with 12 WIS for most characers.