A Black Dragon has a Strength 3 Breath Weapon. All models in a unit that has suffered one or more casualties from the attack suffers a -1 penalty to their Weapon Skill and Ballistic Skill until the end of the following turn.
Source: Warhammer Armies Project: Unofficial 9th Edition
A Black Dragon has a Strength 3 Breath Weapon. All models in a unit that has suffered one or more casualties from the attack suffers a -1 penalty to their Weapon Skill and Ballistic Skill until the end of the following turn.