Haotic strikes is a creature ability which deals damage of 60% to 180% of the creature's attack. Player attack has a great role in that, the more attack you have the more the actual attack fluctuates. As such Haotic Strikes is good for unpredictable fights.
Due to the nature of the ability, Haotic is most likely a misspelling of Chaotic, however since the game uses this, the wiki page reflects that. Furthermore, Haotic Strikes is occasionally referred to as Haotic Damage.