Unstable Concoction Feat 10
Source Pathfinder Advanced Player's Guide
You can create extraordinary-albeit volatile-alchemical wonders, though they have an unfortunate tendency to violently explode when you use them.
When you use Quick Alchemy, you can create an alchemical item from your formula book whose level is up to 2 higher than your advanced alchemy level. You can spend up to 3 additional batches of Infused Reagents when creating this item to stabilize it.
Upon activating the item, attempt a DC 10 flat; for every additional batch of Infused Reagents you spent to create the item, reduce this DC by 2. On a success, the item functions normally. On a failure, the item explodes, dealing force damage to the user equal to twice the item's level (doubled on a critical failure).
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.
AlchemistThis indicates abilities from the alchemist class.