That's right!
This peculiar creature from the spirit realm is the main ingredient for brewing this malicious potion!
As for the two-tailed lizard, bitter ding flower and so on, most of them are used for this summoning ceremony and for enticing spirit realm insects to enter.
The ancestors of the Gaosuo people discovered through repeated experiments that this 'exaggerated insect' has a magical effect of amplifying spiritual power, and they deliberately figured out a special ceremony to summon it.
The so-called process of concocting magic potions is essentially an alternative summoning ritual!
It's less about potion brewing and more about trap hunting!
But for Su Lu, his research on the first layer of the illusory spirit realm is more in-depth than many Gaosuo [Witch Doctors].
Moreover, with his ability to deliver his soul out of his body, even if the prey doesn't take the bait, he can still force his way into the spirit realm to hunt.