This is some ideas I have for the Rahkshi’s weapons. (Edit: now with images from @Oomatu)
Turahk:
Staff of the Brotherhood: A staff given to Norik when he became the Brotherhood’s leader and still uses after having become Turahk. While ceremonial in usage, it is still sturdy enough to be used as a weapon.
Nightmare dust: A strange form of red dust, believed to be spores from an unknown type of fungus. When inhaled, these spores will cause the victim to suffer horrific hallucinations for a period.
Crossbow: Turahk’s second weapon for when he rides his pet, Nirahk.
Guurahk:
Whips of Erosion: Gaaki’s main weapons after becoming Guurahk. While their usefulness is only active above water, they are still a dangerous weapon. When the whips hit an opponent, their skin will start to dissolve.
Bow of Acids: Guurahk’s second weapon on both water and land. The bow creates arrows that slowly dissolves the victim’s body. When fired up into the clouds, the bolt will make it rain acid.
Kurahk:
Pick of Rage: Kualus main weapon after becoming Kurahk. While looking like a pickaxe, whoever receives just a small cut from it will slowly be filled with as much anger as Kurahk himself. The perfect weapon in making allies fight one another.
Greatsword of Wrath: Kurahk’s second weapon. This massive blade may be the most dangerous in the hands of someone like Kurahk. With its size, his strength and fueled by his anger. The greatsword will cut down any would be hero down to size.
Vorahk:
Spears of Hunger: Bomonga’s main weapons after becoming Vorahk. These two spears can drain a victim of their life force when impaled by them, thus giving Vorahk both their wisdom and their strength. However, the spears need to still be in contact with the victim’s body until the light in them is gone. If not, then the life force will be returned to them.
Hammer of the Brotherhood: Vorahk’s second weapon. A giant, steel hammer, given to him by the brotherhood. The hammer is so large and heavy that only the strongest on the island would have a chance to lift it. There are just two beings who fit that description, Vorahk and Onua.
Lerahk:
Daggers of Poison: Iruini’s main weapons after becoming Lerahk. These knives, filled with a lethal poison whose cure is hard to come by, are possibly one of the most dangerous weapons made by the Brotherhood. Lerahk needed to get his armor better protected so he would not cut himself by accident.
Toxic crossbow: Lerahk’s second weapon. This specially made crossbow fires arrows filled with a hallucinogenic toxin. However, it’s bulky design makes aiming a bit tricky.
Panrahk:
Gauntlets of Mirages: Pouks weapons after becoming Panrahk. These gauntlets allow him to create illusions to trick his enemies.
Whip of Sounds: While an odd weapon for someone like Panrahk, it’s effectiveness is unquestioned. With this whip, Panrahk can control the wildlife that lives underneath the dunes of his homeland.
I hope these ideas are ok. I would also like to see other’s ideas for Rahkshi weapons.