Archives of Nethys

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Critical Hit Effects | Special Properties | Weapon Accessories | Weapon Fusions

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 4 pg. 95
Item Level 4
Once per day before making an attack with a weapon with the radioactive fusion, you can imbue the attack with toxic radioactivity. One of the targets that takes damage from the attack is exposed to low radiation that bypasses any immunity to radiation provided by armor’s environmental protections (though the armor’s saving throw bonus still applies). The initial saving throw DC against this radiation equals 10 + half the weapon’s level + your ability modifier used for making the attack (such as Dexterity for a ranged weapon); subsequent saving throws against the radiation have a DC of 13. If the weapon with the radioactive fusion is 12th level or higher, the fusion instead exposes the target to moderate radiation. Only weapons that deal fire damage and use batteries can benefit from this fusion.