"Yui, what's this?!" Xiao You asked in confusion, looking at the purple mist seeping inside.
Yui frowned at the purple mist rapidly approaching her feet and immediately backed away.
"Xiao You, hold your breath. This mist is poisonous."
"What? Poisonous?" Hearing that, Xiao You immediately covered her nose with both hands.
"Yui, if this mist is poisonous, you have to be careful!" she cautioned in a muffled voice.
"Don't worry. This little bit of poison mist can't hurt me." Seeing Xiao You's worried expression, Yui immediately reassured her.
And Yui wasn't lying.
Over the past three years, although she had made little progress in mastering Sage Mode, her other Ninjutsu and Taijutsu had improved tremendously, especially certain Medical Ninjutsu and Taijutsu.
She was very confident in her current abilities.
Besides, she had spent so long practicing holding her breath underwater that, as long as she didn't breathe in the poisonous gas, she probably wouldn't be poisoned.
Holding her breath, she crouched down and touched the purple mist seeping inside with a finger.
Seeing what Yui was doing, Xiao You wanted to go over and stop her.
"Yui, is this really safe?"
Yui shook her head at the question.
"It's fine..."
The instant her finger touched the purple mist, waves of hot, burning pain spread through it.
"Mmph..." Only after leaving it there for a while did she pull her finger back.
Since she could feel its effects on contact with her skin, she guessed that the mist must be highly toxic.
If she left her skin unprotected and exposed to the mist for too long, she would probably be poisoned as well.
Yui considered it briefly. She wasn't particularly worried about herself, but Xiao You was another matter.
"Xiao You, sorry for the trouble, but please wait here for me!"