I do like the idea of perhaps some of the Rahkshi’s weapons being tainted by the blowback from the Mask of Time. In Oomatu’s concept art, Tuhrahk is depicted as carrying a spear of which I assume could’ve belonged to him when he was a Mangaian admiral. Kurahk is also depicted as carrying what looks like either a large ice pick, or perhaps an axe. Assuming Lerahk doesn’t have hooked claws in place of his hands, perhaps those green blades were daggers he used when he was Iruni the theif. Panrahk and Vorahk are a little harder to pin down, but I’m going to guess Panrahk’s back pincers were concealed weapons that fused to his body and Vorahk’s might’ve been mining tools or something similar.