Battles:
Expert/Ragnarok -
Normal Overdrive deals damage to all allies, adding ATK debuff and dizzy to allies.
Raging Overdrive deals large damage to all allies, applying SELF ATK buff and SELF DEF debuff (large)
(Immediately after enemy reaches stun, she will apply sleep to herself and heal herself (80K on expert, 100K on rag)
Expert HP - 4.2M (3T)
Rag HP - 10M (2T)
Recommended Soul/Team
Cassiopeia - Chaos Magic/Healing
Arthur/Gawain (with provisional forest or CM, also Gawain for Ambush)
Mordred - BP/VoF
Amaterasu
Mars
Enma
Hephaestus
Konohana Sakuya
Fire Mephistopheles - Debuffs
Svarog
Ares
Brynhildr
Daji
Rewards:
SSR Eidolon - Amalthea
SSR Weapon - Bountiful Cornucopia Flute
x22 Premium Gacha Tickets
x3000 Magic Jewels
SR weapons/grails/etc
New Kamihime -
SSR Offense - Ra
SR Offense - Argos
SR Raid Kami - Fortuna
Event Mission - Clear ragnarok solo with dark attribute
More info here - http://xn--hckqz0e9cygq471ahu9b.xn--...83%B3%E3%82%B0
Good luck.