Sonic Buffet
Removes 1 buff, Dispel is not subject to meva/SDT, it's 100% accurate like Pavor Nocturnus.
Hysteric Assault
Deals piercing damage, fTP transfers across all hits.
Clarsach Call
Gives Attack Boost (+25%), Defense Boost (+25%), Magic Attack Bonus (+25), Magic Defense Bonus, Evasion (+50) and Magic Evasion to Siren, 3 min duration.
Much stronger than other Astral Flow BPs.
Lunatic Voice
Silence effect lasts 90s, cannot trigger an Immunobreak proc so usage is fairly limited.
Katabatic Blades
Works like Rolling Thunder, sadly.
Chinook
15 min duration, prevents 3 interruptions.
Bitter Elegy
3 min duration, 50% slow.
Wind’s Blessing
1 min base duration, modified by summoning magic skill.
The Magic Shield effect acts as a Phalanx-like effect, potency is based on Siren's base stats (for real... it took me a while to figure this), I suspect it to be Siren's MND/5.
74 MND (Lv 99): -14
176 MND (Lv 119): -35
181 MND (Lv 120): -36
186 MND (Lv 121): -37
194 MND (Lv 122): -38
219 MND (Lv 122 + Summoner's Collar +2): -43
319 MND (Lv 122 + Summoner's Collar +2 + Astral Flow): -63
I'll make a Grioavolr with a Pet: MND augment later.