I smell a conspiracy with this whole Mana Chain thing. For one, it seems to be intentionally created to counter weak Mana Heart Users. Since it inflicts pain with physical aura contact. This whole thing feels like a long game of weakening Humanity as a whole by making it so that ppl eventually forget how to create a Mana Heart.
IN THE MIDST OF THIS DARKNESS. A PATH OF LIGHT EXISTS--OUTSIDE OF THE LIGHT, NOTHING CAN BE SEEN, NOTHING EXISTS. I AM ONE WHO RUNS IN THE MIDST OF THAT LIGHT.