Prophecy of Might

[Scever]

It appears that Prophecy of Might does not do anything. Cast it on my yul sagi, no change of stats. Supposed to increase p.Atk +25% among other things right?  It doesn't increase any stats at all. What to do?

[Nymphadorae]

It's not a bug.

This is the description of the skill: For 5 min., the targeted party member's P. Critical Rate, P./ M. Skill Critical Rate, P. Critical Damage, and P./ M. Skill Critical Damage +25%. Additionally, activates the Spirit of Iss effect. P./ M. Atk. and P./ M. Def. +20%.

So it gives the targeted party member's P. Critical Rate, P./ M. Skill Critical Rate, P. Critical Damage, and P./ M. Skill Critical Damage +25%, which is what you want for your yul, and it's a great boost.

The Spirit of Iss effect P./ M. Atk. and P./ M. Def. +20%, as the name says, it's a buff that appears on your iss, boosting the iss stats.

[Jeune]

Yes, the actual description is a bit confusing, because it says "P.atak/P.skill/M.skill crit rate,  so it looks like it's supposed to give P.atack, But PoM is only about critical rate and damage (for the targeted buff)