The most powerful hero of the Dungeon faction.

Explain why Sinithar is not good in long games.

It is believed that, in general, in long games, by the time the final battle arrives, any Warlock has enough mana to cast enhanced versions of spells for almost the entire battle, and since by this time a lot of units have accumulated, heroes specializing in units (such as Sorgal, for example) gain a certain advantage.