Double attack, or as phrased within the game strikes twice or shoots twice, is a special ability of some creatures, that enables them to attack the same target twice in one combat round. Creatures with double melee attacks execute their second attack right after the attacked stack has retaliated, and if the defending stack has killed some of attackers, only the remaining creatures (if any) will do damage afterwards. Shooters who shoot twice do not get the second attack if engaged in a melee fight.
Creatures with double attack:
Marksman - shoots twice.
Crusader
Grand Elf - shoots twice.
Wolf Raider
Cyclops King - throws 2 boulders, when aiming at castle walls.
Ballista - shoots twice with advanced or expert Artillery.
深渊号角
Ayssids have a Ferocity ability which means a double attack if any unit in the attacked stack was killed by the first hit.