Firstly, if the merfolk tribe and that Sword Cultivator had a covenant.
The old man would surely know about it.
After all, if he could even predict that Jiang Xiaobai would possess merit, how could he be ignorant of this?
Knowing everything, he allowed a terrifying Sword Cultivator to stand guard within.
That's against all reason.
Unless the old man wanted to trap and kill the merfolk tribe.
Although it's not impossible for him to hold a grudge against them and intentionally trap them to their deaths.
But overall, it poses some issues!
It's so abrupt, an old man, holding a grudge against the merfolk tribe, resorting to these methods to trap them to death?
He might as well have called upon a celestial being to annihilate them.
Secondly, there is actually nothing special about the Dragon Tongue Grass.
Jiang Xiaobai's alchemy skills are incredibly strong. Even though he had never seen Dragon Tongue Grass before, he could still perceive its energy after a minimal analysis.
