Undead Realm
For the next three months, Sam was in Naga Loka as he tried to find every single grass or herb that supports the decay of flesh and bones.
Since the Naga Loka is the home of many toxins he figured he could find what he wants here.
After using Buck and all his networks along with Yodha's help to get his hands as many things as he can.
His own poison along with Mia's wouldn't be of sufficient quantity and he wants them in the form of herbs.
After finding enough, he once again came back to his home planet and this time, he came with some Nagas along with him. He enrolled them in the school. But unlike Chatur who stayed in his human form most of the time, these people assumed their Naga form.
These Nagas are bastard orphans of many people who don't know who their parents are. So, they don't have that unreasonable superiority complex of the normal Nagas as their lives are bitter than humans who can at least sell their bodies.