It is the personal tome of Soren.
This tome is exclusive to Soren in Fire Emblem Heroes and was added in Feburary 2018 as a new 5-Star exclusive tome for him.
The Tome inflicts -7 to the Atk of the enemy unit with the highest Atk on their team until the end of their next action. When refined, Soren will also gain Atk/Spd/Def/Res equal to the total number of allies adjacent to him times two, similar to an Owl tome.
At start of turn, inflicts Atk-7 on foe on the enemy team with the highest Atk through their next action.
- When refined, the Refine Icon is the same as Soren's Brand on his forehead.