Oaka did not try to stab Lex in the back the moment he entered the shop, so that was a good sign. Instead, the snake quickly slithered past him and got behind the counter, giving Lex its sincerest smile - which basically just looked like it was showing Lex its fangs. So… not a good look.
"Good sir, may I have your name? And how about what you're looking for? There are too many wares in my shop, so if I know exactly what you need, I can guide you," Oaka said enthusiastically. "By the way, full discretion, we accept various currencies, but our preferred form of payment is with drops of Celestial Dew."
Lex was familiar with Celestial Dew. Basically, the energy that Celestial Immortals contained within their body was unique, tinged by the influence of the eight ruling laws. So if Celestials concentrated a large amount of energy and condensed it, it would form a drop of Celestial Dew.