You have learned to hide a spell behind the casting of another spell. This masks the second spell with the first from the unwary.
Prerequisites:heighten spell, still spell silent spell
Benefit:when you perpare a riding spell select a second spell. When you cast the riding spell the second spell is cast as well. If any save throws are required then the dc is set to the altered spell level of the riding spell. If the save throw of the second spell is failed the target of the riding spell does not recognize that the second spell was cast on him.
People trying to identify a riding spell take a -10 penalty to recognize the second spell was cast. If the second spell is lower level than the riding spell this penalty increase by 5. If the second spell is higher level that the riding spell the penalty decreases by 5.
A riding spell has a spell level of both spells combined +4.
Too powerful.
You could cast four spells a round this way with Quicken Spell.
Too powerful.
You could cast four spells a round this way with Quicken Spell.
Four 1st level spells at the cost of a ninth level slot and a sixth minimum.
Also with a familiar spell you can already do that cheaper than this feat, and cast higher level spells to boot.
I am considering a requirement that riding spell can only be applied to harmless spells though.
My other thought is:
Prerequisites: quicken spell, silent spell, still spell
Benefit:when you cast a riding spell in the same round as another spell at the same target the target does not realize the second spell was cast if he fails any save throw against the second spell. A riding spell must be applied to a quickened spell and raises the spell level by 1.
People trying to identify a riding spell take a -10 penalty to recognize the second spell was cast. If the second spell is lower level than the riding spell this penalty increase by 5. If the second spell is higher level that the riding spell the penalty decreases by 5.