At it's base function; the Corvus Tome functions as a stronger variation of Henry's normal Rauðrraven tome; simply offering more Might to the mage. However, as a refine effect; the Corvus Tome provides both Guard and an Atk/Res-6 penalty during combat to opponents with an Attack stat at least 3 points higher than Henry's.
Grants weapon-triangle advantage against
|400 SP, 500, 200|
|At the start of combat, if foe's Atk ≥ unit's Atk+3, inflicts Atk/Res-6 on foe during combat and Special cooldown charge -1 on foe per attack. (Only highest value applied. Does not stack).|
| Grants weapon-triangle advantage against|
colorless foes, and inflicts weapon-triangle
disadvantage on colorless foes during combat.