Venomous snake was not the only thing that Jared had prepared for Zenith, because he had more up his sleeves. A month was enough time for him to prepare everything, especially with the knowledge that he got from Aurel.
The poison that Dawn had put on her body and affected Jared, Archie and all the black magic users that marched with them to the palace, had long gone. Jared was familiar with the poison after all.
"This is it. This is the time." Jared smirked, while Archie stood by his side and looked as excited as him.
But then, a magic user entered the room and informed Jared about how their first attack had failed. Apparently, there was someone, who were very expert in poison and they managed to find the antidote of it just in time, therefore, the snake attack didn't really affect the shifters.