Michael would be satisfied even if the Energy Vein underneath the Primedival Pyramid was only 1-Star. Millions of Inferior Energy Stones clustered together were still worth a fortune.
But then again, Michael couldn't tell how many Energy Stones were waiting for him underneath the Primedival Pyramid or what was left of the Undead Pharaoh's home. Ten, tens of thousands, or millions of Energy Stones could be waiting for him to mine.
One way or another, Michael doubted that the Energy Vein in Paradise Valley was a 1-Star vein if the Undead Pharaoh, the strongest Pharaoh of the Second Epoch, decided to live there. He ruled from the Primedival Pyramid and was put to rest in his home after Starheaven Pharaoh and others eliminated him.