Poison

Snake venom
The snake tribe regularly used venom to aid in their assassination. They collect their venoms from the snakes they kept in their temples and hideout. On the other side, the snakes also possess biles strong enough to neutralize any poison that they may ingest.

Frog poison
The frog tribe is not necessarily able to produce poison on their own but instead they're able to store and concentrate poisons from what they ate (mostly insects and arthropods). They store their posions in their lymphatic glands and will secrete them through their skin if threatened. Frog liopis circumvent this by preparing their poison beforehand or by looping the poison cycle in their mouth. By placing the source of poison below their tongue, they're able to absorb and concentrate the poison much faster and able to immediately use them. Poisons produced by frogs is lipophilic and thus harder to dissolve in water but readily absorbed in the digestive tract or by skin.

Centipede venom
The centipede tribe is able to secrete venom if they're in their avatar state or on the other hand they can collect it using the relic from Gu. Gu left a pair of claws that constantly secrete venom. A piece of the claw is submerged in a jar and is used to create a concoction used in the baptism to create centipede monks. By bathing in this venom, a disciple will lose all of his hair and he unable to reproduce anymore but in turn granted superhuman physique. He will he stronger, faster and have a hardened skin, able to block even arrows. The other claw is in the possession of the salamanders since everyone can remember. One version of the story said that the centipedes gave them as a gesture of friendship while another said that a frog champion took it after defeating centipede's champion and then gave it to the salamanders as a gratitude for helping them manage his growing settlement. Either way, the centipedes harbor no resentment for the loss of their relic.