Worlds of Ultima: The Savage Empire/Sakkhra tribe

The Sakkhra caves
Leave the Barrab mesa and travel west. The stairs that lead to the Sakkhra are on the east side of the mountain slope.

In the village you can recruit Kysstaa. He's a well balanced fighter, with higher strength and dexterity than any other fighter character in the game. You can equip him with an atl-atl and a good stock of spears. Right now, he's the only party member strong enough to get a blue stone from a blue boulder: that's actually the main reason you're here for.

Recruit Kysstaa, give him Rafkin's metal hammer, then go in solo mode and [U]se the metal hammer on a blue boulder. You will get a blue stone.

Item list
The lizardmen don't have many items that can be useful for the humans.

Character dialogue trees
Note that male Sakkhras have a crest on their head, while females do not.

The Kotl teleport plates
It is now time to travel all the way back to the Barako village, that is pretty much at the opposite end of Eodon valley.

Luckily, there is a faster way. You probably spotted already the strange blue plate near the way up the Barrab mesa: it is a Kotl teleporting device. It corresponds to the Moongates in the previous Ultima titles, therefore it will be called here Kotl Moongate.

Step on any Kotl Moongate, and you will be teleported to the hub, where seven moongates link to seven different locations. Of course, there is none that connects to the Urali village: it would be too easy!

Exit the Sakkhra caves and walk all the way west, then south, and enter the Kotl Moongate there. In the Moongate hub step on the plate that teleports near the Barako village.

Eight unlabeled hatches are definitely reminiscent of the classic Mega Man series.