Ok, if I were to TR a wizard...(all theoretical here anyway)
"Past Life: Wizard
You were a wizard in a past life. You occasionally find yourself desiring a good book. Each time you acquire this feat you gain +2 to spell penetration checks and the DC's of wands you use. This feat can be stacked up to three times. "
(And if it's the 1st TR, I'd also put the purchasable one in)
Past Life: Arcane Initiate
You recall more about your past life as a wizard. You have +1 to the DC's of spells you cast and can cast the magic missile spell ten times per rest, creating a missile of magical energy that darts forth and unerringly strikes its target inflicting 1d4+1 force damage. For every 2 caster levels beyond first you gain an additional missile, maximum 10 missiles.
Will these DC's benefit a sorcerer?