King's Empire Sky City treasure event

If you have not built a sky city yet, here is your chance to collect the items needed to build one!
There is still some 141 hours to go, so quickly now! Just attack all those level 25 ancient sanctuaries, but be aware that only 5 first attacks per day that do not need sanctuary signets. Those specialized building materials are extra item drops.
So you want to build a sky city? As you can see, the extra items needed are a lot and they are only obtained from certain events as leader board prizes.
Anyway, attack away guys!