Fortune: "Maybe to others of our kind but not to Gods or Goddesses."
Bane: "I've lost to our summon before. Never to a god or goddess."
Core: "I haven't. Amd i'm not stupid enough to try to fight a summon."
Bane: "F**k you."
The creature above is called Core. She lives in a world of gods and other fantasy stuff.
Core and her "siblings" (The other creatures she was summoned with) are shadowy creatures that kill gods that overstay their welcome. No other god/goddess or creature can kill them. Only a Summon can. (The picture you originally commented on was a Summon version of Core. its when they become a "parent" because they can't reproduce the same way other god/goddess can. They can have relationships though!)
They also have specific jobs. Bane does the Spirit/Hell work. Fortune does the Star/Space stuff and Core does the gorier stuff taking care of all god types as the eldest.
They create their "kids" outta shadows. Aka they create tiny versions of themself, but they are a big different. Usually, the eldest turns into their Summon form first.