At 79%, the boss will gain a red aura that will sap our HP, this will be canceled when its HP reaches 69%
At 69% of its threshold, the boss will recover 2M, gain a green aura that heavily reduce our MAX BRV (our damage become 0), will do turn warping, and recover their HP 2M more. To cancel this situation we need to deal trap damage to them. After we cancel that aura, its HP will be consumed and become normal to 59% (that 4M recovery wil be lost automaticly, we don't need to reduce it anymore)
When it reaches 49%, the boss will gain a blue aura that will sap our INT BRV to 0, and watch out when it reaches 39% & 19%, if you're not in a BT/summon phase while the 2 small blades' HP aren't below 59%, the main boss will do an instant kill attack. To trick this situation, you must use the summon/BT phase and kill the main boss ASAP.
To get S grade, we should recover our HP at least 200k, I failed because of this useless mission, so I have to retry this again to get S grade
Enjoy!
Special thanks to my membership patrons:
@Corrupt_Vergil
@Cornell Williams
@Arthur Mason
@albert chavez
@Nico D.
@timmybranford
Credit:
Main theme: Ragnarok Online - Invisible Invasion