Uninvited guest!

The old turtle took out the dark green liquid, came to the ice cave, poked Ling'er's finger with a silver needle, and took out a few drops of blood.
Then, in a transparent bottle, Ling'er's blood and the drop of dark green potion were mixed together.
"Sizzle…"
The two blend together, making a slight sound.
In the transparent vial, you can clearly see that the drop of dark green potion slowly turns transparent.
Ling'er's bright red blood was boiling, and white steam was rising.
...