Pathfinder 2e Action / Feat: Unstable Concoction

Description You can create extraordinary—albeit volatile—alchemical wonders, though they have an unfortunate tendency to violently explode when you use them.
Applications 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 check; for every additional batch of infused reagents, you spent to create the item, reduce this DC by 2. On 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).