Aurora Beam causes damage and has a 10% chance of reducing the enemy's
Attack strength.
Note that since the victim's Attack statistic is altered, only Physical
attacks, such as Swift and Dig, will be weakened. Damage caused by Special
attacks like Psychic and Solarbeam will be unaffected.
For more information on the different kinds of attacks and how damage
is determined for each of them, see the Attack Base Explanation.