Fangol

[Hammer]

The warrior axe from sky, Fangol, has +5 sv Poison.

However, when I equip it, it reduces my poison resist by 5.

[nilbog]

Could not replicate this.

Ogre warrior.
No primary or secondary.
Equipped Fangol.
Poison resist increased by 5.

Perhaps the weapon you replaced had +10 poison resist.