Tribal Plateau is a quest, available as soon as Orc Bones is finished.
Additionally this is the first occasion where the player meets Elise.
Click on [Campaign] -> Select [Tribal Plateau] -> Gain passage through the dungeon. Kronos, the leader of the Taurens, is currently located on Tribal Plateau. Prepare for a long, hard battle.
When entering the dungeon for the first time:
Dinah: Elise has made it safely back to the temple and is passing along word of your valiant actions against the Taurens!
Hero:She is too kind. *clears throat* Anyway, is this the Tribal Plateau?
Dinah: Yes. Kronos and his Tauren army are not far. They are soon to fall at your hand. But we must be on guard. The forces here are very strong.
Hero: Dinah, this place is dangerous. Perhaps you should head back.
Dinah: I will follow you to the end; wherever that may be. Come! Let us tarry here no longer. Kronos is very near!
When reaching the dungeon boss:
Kronos: You worthless humans! All the bounties of Balenor will be ours one again. Bow and show respect to your new master.
Hero: Kronos, you have plagued this once glorious land and brought it into ruin. You must be stopped!
Kronos: Hahahahah! I am great Karnatog reincarnated! I will lead my people back to our glory days when Taurens reigned supreme over all other races!
Hero: Kronos, the time of the Taurens has ended. I will put you back in your place!
Kronos: Muahahah! Big words for such a puny human! Come! Feel my steal (sic!) in your belly!