"But it refused."
Sans was surprised Frisk came back alive. And Frisk was shocked by Sans attacks. While they are still shocked Sans felt someone is going to slash him from behind, but he dodges it then uses telekinesis and pushes the person to the wall in front of Sans.
He cant believe what he saw, it's was the first human who fell to the Underground, Chara. Chara died a long time ago trying to break the barrier with Asriel. But she's alive and has a murderous feeling in her.
"Kid... What did you do to Chara." Sans asked.
"Nothing, I just give her some of my LV," Frisk Answered.
"Heh, I guess it's 2 vs 1 huh."
"Welp"
"Bring it on."
Sans summons a Wall of G bones on both sides of the corridor, then the a throws a hell of bones at them. Frisk and Chara tried their best to defend Sans attacks, then a C Blaster rams Chara. Chara fell and the C Blaster blast her pushing her to Sans, a bone summoned on the ground where's Chara going into.
The bone hits Chara and flies, Sans summons a bunch of B bones on Frisk and summons C Blaster behind Frisk and another one on Chara, the blasters were aiming both on them and it fired knocking them into each other.
Chara and Frisk were seriously injured in that attack. Frisk tries to grab some Items to heal Chara and her. but there's nothing in her pockets. Frisk forgot to she used all her items coming in here and get the items in the chest.