Press Space. (That's it. LAMO.) Lore: Before the Battle: Some time after a last breath run, Sans once again found a door in waterfall. Once he entered it, he was again greeted by Gaster. This time, he did not just tell him about the past normal timelines, but about the past last breath timelines. Sans then went to the last corridor to confront Chara with this newfound knowledge. Along the way, he found a spear from the dust of Undyne, and took it just in case. Phase 1: Just Sans. Phase 2: Chara slashed Sans so hard, his head fell off. He now holds his head on one hand, Undyne's spear in the other, and keeps fighting on. Phase 2.75 (The only .5 phase that needed its own lore.): Chara grabbed Sans' head, and slammed it into the ground, dealing too much damage for Sans to handle, so he dusted away. Phase 3: Like in the OG Last Breath, Gaster revived Sans. However, it caused some damage to Sans's skull and the blood everywhere else on his body was still there. Sans now uses both of his bad time eyes and Gasters assist. Phase 4: Gaster hacked the code so Sans can't die under normal means, so Chara is stuck fighting him until they find out what's happening. Cutscene & Phase 5: Chara found out what was happening and ran to the barrier to get get the souls while Sans was not looking, killing Asgore in the process. Once Chara returned, they tried to use the souls. However, Chara forgot that humans can't use human souls, so instead of the souls powering them up, it damaged their soul instead. It's was Chara's biggest mistake, and the only one Sans needed.
Animation & Inspiration for Phase 4 by @jaycobzakai (I still can't Animate.) Game Over Sprite by @VHSS4NS2024 Phase 1 Song: Toby Fox Phase 1.5 Song: Incin Phase 2 & 2.5 Songs: Andrimal Phase 2.75 & Cutscene Songs: The Caretaker Phase 3 Song: david0414 Phase 4 Song: Monstercat Phase 5 Song: IDK (If you know any of the people who made the songs that I don't know, please let me know in the comments.)
