Quest: One who Thirsts

Summary

Talk with Bacchu about power.
He will give you a quest.
Bring him one Upper Beer.
He will then give you SHPG Authorization Card EV-UB
You must now go to the STEVEN machine, use the card and enter the area.
- Cannot be done if STEVEN is still on cooldown, either reset the cooldown with 3 Hack Chip 666 or wait for the cooldown to finish
- Solo only
You will be thrown into a modified version of STEVEN floors 55 and 56
Once the program starts you will have 10 minutes to clear Floor 55, and 14 minutes to clear 56.
You must keep fighting and killing all mobs until you have defeated 10 PROTECT Wall UB-A13 (Pazuzu) on Floor 55.
On Floor 56 you must keep fighting and killing all mobs until One Who Thirsts Baphomet spawns, and defeat it.
Upon successful completion of Floor 56 a reward box will spawn
Report back to DB Bacchus
He will now ask you to take a quiz given to you by the Mada right next to him.
The Mada will then ask you a question, if you answer correctly, he'll give you a Sand of Logic, otherwise, an Ointment.
Report back to DB Bacchu to finish the quest.

If you fail the run, it will cost you 40 Upper Beer to get the EV-UB card again.
All demons within the run only take 60% damage from almighty skills.
It is recommended you do the run either freshly leveled or with a powerful, preferably almighty demons, as many demons of varying affinities and resistances will spawn, and will be difficult.
The answer to Mada's question is equal to the sum of an arithmetic sequence (1 + 2 + 3...) starting at 1 and ending at 8 (36) in the Japanese text, or 7 (28) in the English translation as of the 23rd of January of 2020.