Berserk is an ability that any unit gaiining damaged by normal damage will get Attack Plus x. The ability will also work if the unit is hit by Whirlwind ability. As mentioned, the ability will not have any effect if the unit is damaged by status damage or ability damage. The extra attack is treated as permanent bonus, which Sap ability will deplete these increased attack first. As of now only Berserk 1 is available among all kinds of cards.
List of cards with BerserkEdit