Burning Lore (Su)
At first level, the soulfire master does not risk the usual penalties of backlash when using forbidden lore. Instead, when backlash occurs, the spell is completed normally and the soulfire master suffers a point of Constitution burn. A soulfire master cannot use this ability if doing so would reduce his Constitution to 0. This ability otherwise acts as forbidden lore, including the caster level bonus increasing with class level and for effects that modify the chance of backlash. The risk of backlash increases from 15% to 50%. Archetypes that change the backlash risk, such as the devourer, may be combined with this archetype, stacking the backlash changes.
This alters forbidden lore.
Soulfire Talent
At 4th level, the soulfire master gains the Soulfire feat even if he does not meet the prerequisites. Additionally, he may use burning lore when using the Soulfire feat with no risk of backlash.
At 7th level, the soulfire master may pass off up to 2 points of Constitution burn when using the soulfire feat with the channel punishment invocation.
This replaces the bonus feat gained at 4th level.
Note: Ability Burn
Ability burn functions as ability score damage, but may not be removed by any means other than 8 hours of resting, which removes all burn.
U: Part of Ultimate Spheres of Power and does not need to be bought separately from that book