Unless truly cornered without options, Ansel was reluctant to use that power on himself again... Fate's gambit ultimately hinged on constraining Ansel's current capabilities.
Ansel possessed the ability to help the Western Lands weather the dragon calamity and, barring unforeseen circumstances, the power to rescue Evora from that mysterious force. Yet, frustratingly... he couldn't achieve both simultaneously.
Though potent, the God from the Machine had glaring limitations—it wasn't a power Ansel could wield frivolously. The current Ravenna couldn't sustain it long. Given the impending dragon calamity's intensity... even wielding the God from the Machine, prioritizing the Western Lands' protection would inevitably plunge him and Ravenna into a grueling battle.
If Ansel now had the power to effortlessly sweep away all dragons, he wouldn't face this predicament... Or rather, when Ansel truly attained such power, Fate would be the one at a loss, not him.