Xtale Chara showed some serious mastery in this underground brawl. Let's break down the grit. First off, they got determination on their side, meaning they ain't gonna be easy to take down. Now, I know Last Breath Sans can dodge like a madman and block like a brick wall, but facing someone who can overwrite reality? That's a whole new level of chaos. When Phase 3 of Sans came into play, holding all those insane stats and flipping the world like a cheeseburger on the grill, Chara didn’t sweat it. With the Overwrite ability, they manipulated the very fabric of the fight. Seriously, summoning allies and creating attacks right outta thin air? Talk about bringing the heat! Not to forget, they can heal themselves too, which means all that damage Sans can dish out just ain't enough. Sans may have all those crazy Gaster blasters and fast attacks, but without the ability to keep Chara down for good, it was like trying to nail jelly to a wall: impossible. Chara flipped the script and turned the tide with calculated chaos and relentless determination. No chance for Sans to even breathe! In the end, Xtale Chara took the win with raw skill and supernatural strength, proving that you don't mess with those who can rewrite the rules. It’s a tough world, and in this underground brawl, Chara walked away the victor.