I'm level 55. Apparently I cannot access the Supreme Golem at this level. Defeating 5 Supreme Golems is the only achievement I have left in this 2017 Halloween event. Does this mean I won't get the final reward? If any? And what's with the mountain on my southern island? Will I be left out of what that has to do with the Halloween event? I have the resources to easily defeat the Supreme Golem.