Mutagenic RenovatorConsumable 10
Source Pathfinder #180: The Smoking Gun
Price 180 gp
Weight light
Activate 
Interact
This sludgy concoction is said to be derived from liquefied mutant scales. For 1 hour after you imbibe the potion, your skin warps and mutates to grant you resistance 5 to one type of energy damage. When you first drink the potion, choose either acid, cold, electricity, fire, or sonic damage. The potion starts by granting you resistance against this type of damage. Each time you take damage from one of these listed energy types other than the one you currently resist, your skin mutates, causing you to lose the energy resistance previously granted by this potion and gain resistance to the type of energy by which you were most recently damaged, and the potion's duration decreases by 10 minutes. The resistance shifts only after you take the damage, so it doesn't apply to the first instance of damage
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
AbjurationEffects and magic items with this trait are associated with the abjuration school of magic, typically involving protection or wards.
ConsumableAn item with this trait can be used only once. Unless stated otherwise, it's destroyed after activation. Consumable items include alchemical items and magical consumables such as scrolls and talismans. When a character creates consumable items, they can make them in batches of four.
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.
PotionA potion is a magical liquid activated when you drink it.