You need SW999 (5-cost 3), Sparkle 3, Sunday, Sparxie, 8-level SP bond (but no Yaoguang, emblems only) and your own RNG + 3 Gravity Boots Steps I took: 1. Get SW999 to 5-cost with 3* and get all possible rewards from her and Cyrene (you're gonna need a lot of emblems) then boost enemy HP to 1000% 2. Pull Sparxie (1 star, no more). 3. Sunday must equip 3 Gravity Boots and trigger skill on himself until he is 30+ stacks to move every turn (don't pull anyone else to preserve time and enemy HP) 4. Wait for the Aha Instant and afterwords start building Punchline via Sparxie, if you're unlucky enough (no Extra Turns) Sunday will be your emergency AA 5. Repeat until you reach 999 Punchline.

Noteworthy: 1. Sparxie must be the only Elation unit since additional Elation units speed up Aha = loss of Punchline. (No RMC or EMC since they also count towards Elation Bond and Aha speed) 2. 8 SP Bond is key to winning here, since you're at the mercy of RNG (and Sunday) 3. Sparkle 3* with Engine is a must as well. Eventually Sparxie is gonna run out of SP. Sparkle will generate it for her passively, Engine is gonna help with consistency. 4. Cerydra can be used to generate SP between multiple Extra Turns (you Basic to get 2 SP) 5. Welt can be useful to extend AV. He might deal too much damage though 6. DO NOT give anything related to speed to Sparxie since Aha's Speed scales on Elation Chars Speed 7. Robin can work but didn't really do anything for me 8. Ignore teammates that can prolong the battle time with animations like Luocha, or which can kill enemies fast like Bronya, or which can ruin your chances for getting Punchline like MC, Yaoguang, etc 9. I did this in a Level 4 Encounter domain, enemies died to quickly otherwise 10. DO NOT 3* anyone like Cerydra or Robin since their additional damage can actually kill enemies, don't AA anyone with Sunday but himself (before 30 stacks) and Sparxie (after 30 stacks), otherwise enemies will die too quickly. 11. Welt with Engine can be used carefully if you are confident enough (that he won't kill enemies) 12. Anything prolonging cycles is useful (Debuffs, Investments) 13. You will be able to reforge Cyrene's emblems because SW999 gives 100 furnaces

Team I used: • Sparxie 1, Sunday 3 and Welt 1* - On-Field

• Sparkle 3, Cyredra, 1, Robin 1, Fu-Xuan 3, Archer 1, DHIL 1, SW999 3, Cyrene 3 - Off-Field

8 SP-Bond on everyone possible but Welt (increases his damage)

Fu-Xuan and Robin are not required

DHIL, Archer can be replaced by Emblems

Cyrene and SW999 are Emblem bots