Originally Posted by
IsaacGravity
Mirage Storm- Go to the Extra Multimode Festival Mission (神宴狂瀾の超星霊祭!) on A or ∞. You earn said weapon from the boss box by S-Ranking Yaoroz's Route (超神獣ルー). Think there was a nicely made guide on how to handle that somewhere on the boards.
The alt method (via IMs) is: 1. IM: Profusion Area (Mizuraki C.D), Neudiaz Table 1 on ∞ Rank.
2. IM: Illusions Area (Ragol VR field), Neudiaz Table 5, ∞ Rank.
You may want to set Yaoroz as a boss for said IMs since crafting an IM with Yaoroz as the boss and doing it on ∞ Rank will also give you a chance via the boss box.
Archservant- Hrm... having trouble making this one out... Will place the RAW for anyone who can make them out better...
ガオゾラン:MAX3∞(Hu,Ra) [Kill Gaozoran as a HU or RA in MAX3 (Maximum Attack Cross) ∞ Rank]
-教団警衛士・オズナ
-侵入作戦∞(Fo) [This one is kinda linked to the mentioned enemy above. Basically Go to Woodland Raid (密林の侵入作戦) on ∞ Rank and kill Armed Servant - Ozuna as a Force. Which is your highest chance to get the drop)
ボス箱 (Boss box)
巨殻獣∞(All) (Been looking at this and I think its basically the EP 2 Beach Free Mission on Clad 6 that has Giel Zorg as the boss in ∞ Rank. Type be damned.)
IM殻獣S,∞ (An IM with Giel Zorg as the boss on S or ∞ Rank)
IM殻獣S,∞(部位破壊[手])