Archives of Nethys

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Weapon Fusions

A weapon fusion is a small, prepackaged add-on that can be attached to any weapon to infuse it with magic. Adventurers use weapon fusions to customize their weapons for a specific enemy or to increase a weapon’s overall effectiveness. Weapon fusions are magic unless stated otherwise. While this causes the weapons they are installed in to be considered hybrid items, in truth the weapon and the fusion still operate separately. An ability that affects a magic item could affect the fusion installed in a weapon, but that would not prevent the weapon’s core function from operating normally unless the weapon was also independently a magic device. The hybridized fusion (see page 194) is an exception to this rule, as noted in its description. Weapons with fusions are considered magic for the purpose of overcoming damage reduction.
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Source Alien Archive 2 pg. 55
Item Level 8
The leeching weapon fusion gives a weapon the leech critical hit effect. When you score a critical hit with the weapon, if at least one target of the attack takes damage equal to the weapon’s item level, you recover a number of Hit Points equal to the weapon’s item level, in addition to any other critical hit effect. This healing restores Hit Point damage first, followed by Stamina Points. Any healing in excess of your Hit Point damage and Stamina Point damage is lost. Once you have benefited from this healing, you cannot benefit from the leeching fusion again until you take a 10-minute rest and expend 1 Resolve Point to regain Stamina Points.