From memory, Odin's attacks are:

1.) Frontal Cleave: His auto-attack
2.) Hall of Stone: Small AoE petrify
3.) Hall of Lead: Large AoE heavy
4.) Gungnir: Tosses multiple lances that land, creating an AoE stun on impact, and the area around them inflicts Bleed. The locations seem to be random with no indicator.
5.) Darksteel Reigns: Large AoE. Honestly, I'unno what this does. I think it inflicts Vulnerability Up?
6.) Einherjar: I've never been hit by this, even though the actual AoE covers the majority of the FATE area. I've always suspected that, since he does it after Gungnir, that maybe it inflicts massive damage on those within Gungnir's AoE?
7.) Zantetsuken: Begins cast at 5% HP, and will kill everyone participating in the FATE.

And, lest we forget his ultimate attack...

8.) Error XXXXX: Server crash for everyone, baby!