Sagar Kingdom had no future due to a lack of resources. To date, despite its stabilisation over two centuries, the sole cultivator at the Body Stage was Gann-Sagar.
Even iron, the most common material used to build Human Avatars was lacking here. Forget entering the Body Stage, the nutrient content in the crops grown in the region was so lacking that ingesting it didn't even fully satisfy their body's nutrition requirements, not to mention converting that into Prana.
Therefore, their cultivation was slow, often staggeringly dead, with the strongest among them barely hitting eighty Prana.
The density of energy in the food was abysmally lacking. Therefore, even if one stuffed themselves to the brim and digested to the limits of their daily consumption, they still wouldn't be getting enough nutrients.
