How to kill Black Dragons?

I meant that one Titan is enough. In any case, the number of cloned Titans will exceed the number of original ones. As for the fifth week, the increase in Djinns (without Nobility) is six per week. For reliable destruction of the Dungeon, 30 Djinns are needed. The main striking force will be Illusions.
...I think we can conclude the discussion on the topic of "how Haven can defeat the Dungeon." The author of the topic suggested considering an option without the participation of level 4 creatures and with a weak hero.