A dark slit had opened up in the edge of the snowdin, as it opened up, two bone-like hands opened it up. A small 4'5ft figure stepped out and behind him an incomprehensible view to the human eye from which he came from. Xilian had arrived in the underground, looking around silently he decided to make his way down the snowy area towards the waterfall, he looked around and then at the river, unbeknownst to the hooded figure watching him from afar within the shadows.
As Xilian made his way down the pathway, he saw a monster without hands, resembling a dinosaur. It walked over to him curiously. "You aren't from around here huh? I haven't seen a monster like you around the underground! You look real-" Their last breaths were cut short as Xilian had torn his bone-like hands through their esophagus, grabbing hold of their vocal cords and brutally pulling them out. The monster's eyes widened in pain, unable to form screams as their body began to dust away, their soul would be seen levitating upwards before cracking.
Xilian grabbed ahold of it and looked at it, forming out spiked chains which poked into the soul. The soul let out quiet and subtle screams of Monster Kids voice as the chains hadn't allowed it to dust away into paradise. The soul absorbed into Xilian as his 'EXP' bar grew, he looked at the bar appear in front of him, grabbing ahold of it and masking it. The EXP number had now been 0, his LV also remaining as 1.
He heard a woman calling monster kid out, Xilian took the form of the kid, mimicking his voice and personality to perfection as he had gained complete memories of the monster. "Y-Yes Undyne! I'm coming!" 'Monster Kid' said, running towards the direction of the voice, falling on the floor clumsily.
'Monster Kid' had run up to Undyne, admiring her armored looks "Woaah! You look as cool as always, Undyne!" Undyne looked down at 'Monster Kid' and patted their head, she spoke, her voice deepened due to the armor she wore "Bhahah, thanks kid. Everything alright? I heard you talking with someone." She said, crossing her arms.
"Yeah! Everything's okay, thank you Undyne! Oh and I thought it was someone new, but it was just some random monster wearing new clothes that I haven't seen before." 'Monster Kid' said, with an embarrassed tone.
"Random monster.." Undyne grew a little suspicious, walking past 'Monster Kid' and patting their head. "Well, I'll be seeing you twerp, don't do anything reckless!" *Undyne jumped from rock to rock at incredible speeds as the 'Monster Kid' kid just jumped up and down in amazement. As she got out of view, the smile slowly turned into a blank stare, turning around. He made his way down Waterfall, his disguise fooling Undyne.