In this phase, sans realizes that the kid is being controlled by a being, a being from another universe and has to save them before its too late.
Sans- ATK 40 DEF 40, This time he finally saw the real mastermind behind all of this, this time he will save US..... Don’t worry chara! this time, we will have our happy ending back! Resist THEIR control! and as always, stay DETERMINED! for us, for our friends, for our family, for EVERYONE!
Sans: kid, i know this person isn’t you, i finally realized that you are not the one in control, i know i am not a hero, never was, but right now, you need someone who is going to save you from this dark path, and that person you need is me, right now, i am your hero kid, so don’t worry, i will make sure that i will save you from this THING that took away our happy ending, we will be together with everyone again, everyone is counting me to save you, so kid, Resist THEM! STAY DETERMINED KID! I BELIEVE IN YOU JUST LIKE HOW MY BROTHER BELIEVED IN YOU!