Odin's Power

Odin's Power from Bible of Promise vol 2 (2162) seems to be available when the item is equipped, but the skill itself can't be hotkeyed/used.

Type: Active/Buff

Description: Temporarily increases Magical and Physical attack damage but lowers DEF and MDEF.

[LV1]: For 60 seconds, ATK and MATK +70, DEF and MDEF -20
[LV2]: For 60 seconds, ATK and MATK +100, DEF and MDEF -20