I am playing a homebrewed "Flame Disciple" class in heavily modified version of D&D 3.5, which has an ability that adds a certain amount of extra damage to attacks made with fire. The spell-like-ability I plan on using to trigger said class feature, however, allows a Reflex save for half damage, and my DM and I are unsure if that halving of damage would apply only to the base damage or if it would apply to the bonus damage from the other class feature as well. One the one hand, the bonus damage is not part of the spell-like-ability itself, but, on the other hand, it does add to the aforesaid's damage rather than dealing damage on its own.
I know a Reflex save would negate the bonus damage in cases where the creature making the save had evasion, since in that case the spell would do no damage at all and thus not trigger the class feature, so my question is about the case where a creature makes their save but doesn't have evasion.
The abilities in question are:
Will of Fire (Ex): Every time a Flame Disciple inflicts Fire damage on any target, whether with his class abilities or another source of fire, he inflicts an amount of extra Fire Damage equal to his class level. The Flame Disciple may also add x1.5 his CHA mod to any attack he does that uses his fire.
Fire Rupture (Sp): As a standard action, a Flame Disciple can emit a burst of flame from his body, striking all creatures and objects within 15ft of his position. This burst of flames inflicts 1d4 of fire damage per level, with an allowed Reflex Save for half.