The die is cast
Condition: clear Quest:_Rainy_Days_Never_Stay
Location: Talk to Yagiya at Nakano Campsite to teleport to Shinagawa Catacomb of the Templar Knights (Alternate).
Experience: None
Guide:
Talk to Gryphon NPC in Shinagawa Catacomb of the Templar Knights (Alternate).
Go to the door which opened to for Diana fight.
Diana first fight
Barong will respawn infinitely but don't worry, kill one and you will get a repel buff. Go to Diana and let her hit you once to reflect her own attack then kill another Barong, repeat until she's dead(or use Makarakarn). Leave and enter again, talk with Gryphon and go to Diana for a second fight without gimmick.
Abraxas first fight
Talk with Gryphon to open the other door. Go for it for Abraxas Fight. Kill each group of demons once until Efreets spawn, kill one Efreet and then you can focus on killing Abraxas. Leave, enter again, talk with Gryphon and go to Abraxas for a second fight without gimmick.
Black Maria first fight
Talk with Gryphon to teleport to Black Maria area. Defeat Flamies ⇒ Aquans ⇒ Earthies (leave Aeros alive or they will all respawn again) in this order or Black Maria will be invincible. Defeat her to finish quest. If you defeat Black Maria before any Wil o'Wisp suicide or be killed, you get Black Maria plugin.
After beat her you can teleport to this area and repeat the fights anytime.