Kaizack is the main villain and final boss from Hydlide 3/Super Hydlide, and the big bad of the whole series.
Kaizack have created the magical world of Fairyland and all the creatures who inhabit it, including the faeries and monsters. However, once his creations grow beyond his control, he decides to destroy everything, sending various monsters to purge the land, including the demon Varalys and the Evil Crystal. The unnamed hero eventually kills Kaizack, which causes his fortress to collapse and the entire Fairyland to disappear, with only the hero and his fairy companion remaining on the void. Instructed by the fairy, the hero closes his eyes and remembers Fairyland, and upon opening them the whole land is restored, this time without the presence and influence of Kaizack.