Sunny had never been able to summon the shade of Condemnation, and that was not for the lack of trying.
The shadow of the fallen god simply refused to submit to his will. It was too vast, too ancient, and too unfathomable to be compelled by his commands, while Sunny himself was not nearly powerful enough to assert his authority over it.
In a sense, trying to deal with the shadow of Condemnation was even more difficult than trying to command the Fragment of the Shadow Realm.
After becoming a Supreme, Sunny could manipulate the Fragment a little bit — enough so to separate it from the Nameless Temple, at least, even if it had felt like moving a mountain. The Fragment was devoid of personality, though, while the shadow of Condemnation… it had a mind of its own.
Or a shadow of a mind of its own, at least.