Grants Spd+3. At start of turn, inflicts Spd-5 on foes in cardinal directions with Res < unit's Res through their next actions.
Weirding Tome can be upgraded in the Weapon Refinery. When upgraded, the description of Weirding Tome becomes "Grants Spd+3. At start of turn, if any foe's Res ≤ unit's Res-3 and that foe is adjacent to another foe, inflicts Spd/Res-5 on that foe through its next action.". Weirding Tome can be upgraded with the additional effect "If【Penalty】is active on foe, grants Atk/Spd/Def/Res+4 to unit during combat.
【Penalty】 All effects that last "on foe through its next action." Includes penalties inflicted by a skill like Panic or Threaten and negative status effects (preventing counterattacks, restricting movement, or the effects of a skill like Triangle Adept or Guard).".