Variable Core Feat 1
Source Pathfinder Guns & Gears
You adjust your innovation's core, changing the way it explodes. When you choose this feat, select acid, cold, or electricity. Your innovation's core runs on that power source. When using the Explode action, or any time your innovation explodes on a critical failure and damages you, change the damage type from fire damage to the type you chose.
If you have the offensive boost class feature and retrain Variable Core to a different damage type, you can also switch to a different offensive boost that deals the same damage type if you wish.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
InventorThis indicates abilities from the inventor class.
ModificationA feat with this trait alters the construction of your innovation. If you have the reconfigure class feature, you can retrain such a feat more easily.