The Golden Armadyl godsword (passive) is created by using an Golden Armadyl godsword on the altar in Kree'arra's room. This process can be repeated to turn the sword back to normal. The passive effect replaces the special attack.
It has a passive effect that can be toggled on by using it on the altar within the boss room of Armadyl's Eyrie (the room in which Kree'arra is located), however, entering Armadyl's Eyrie requires 70 Ranged. It raises the wielder's Attack and Strength levels by 1 each time, for up to 10% of the wielder's levels. However this passive is fairly unpopular as the boost does not stack with potions and so does not provide any damage boosts, unlike the special attack.
This passive effect has a 25% chance of occurring with a successful hit. However, like most godswords, the passive effect is noticeably less impressive compared to its special attack, in this case due to its slow nature and drain cap.