With the next reboot, I'll add in spell resistances to more spells. They have sort-of worked before, but only been applied to Flash Freeze and Disrupt Magic.
With the changes, the following spells will now be affected by resistance (and may fail, if the target resisted it):
- Dispel (Ghost)
- Disrupt Magic (Ghost)
- Flash Freeze (Water)
- Frost Nova (Water)
- Nightfall (Dark)
- Silence (Ghost)
- Steal Magic (Ghost)
- Terrify (Dark)
Resistance against these spells is gained by items that add "Magic Resistance (Element)". These are level-based, so the higher level your attacker is, the more resistance you need to resist a spell.