A familiar refrain, in some ways. The humans on my Planet found a way to mass produce materia, which the Planet itself formed only sparingly over many years. This enables a crude use of magic, almost entirely purposed to military might.

Between that and other drains on the Lifestream, they would have killed the Planet before long. Difficult to make any use of its magic then.

[Yes, his plans would have also brought about an end, but he had no intention of wasting all that energy. He wonders what will become of the Planet now, doomed again to a slow demise promising no rebirth.]