The stat decrease that can be applied by Chill Atk/Res is considered a penalty.
Any 【Penalty】 on a unit, including penalties, lasts until that unit takes an action. If the unit takes multiple actions in a turn, they will only have the penalty for their first action.
Chill Atk/Res does not compare Atk+Res total stats.
Because no comparison is made, skills like Phantom Spd 3 have no effect.
Unit selection takes place after all bonuses on allies are removed, and before any new bonuses or penalties are applied. All other existing bonuses and penalties count towards their respective stats during unit selection.
If multiple units are tied for the highest Atk+Res total, each of those units will receive the effect.
penalty.
Phantom Spd 3 have no effect.
bonuses on allies are removed, and before any new bonuses or 
