Tl;Dr: Based on the most recent arc, the Great Evil Beast/Great Darkness is >>>>>>>>>>>>> any other “cosmic villain” in DC. Capable of destroying the entire Greater Omniverse and such.
In the latest description of DC”s cosmic history, Mandrakk is said to be the direct manifestation of GEB itself. Not just an avatar or a puppet, but the actual Great Darkness in the flesh. While Mandrakk obviously isn’t as strong as the actual GEB, I think it fits with Mandrakk”s background as “The Absolute Enemy” (referred to as this in both Morrison”s comics and the most recent arc), which the GEB is also referred to as multiple times. Mandrakk is the ultimate representation of nonexistence/anti-story in DC with the exception of GEB.
I stand by my position that within the context of the Perpetua arc, Perpetua is absolutely meant to be stronger than Mandrakk, with Mandrakk explicitly being a “Scion” of Perpetua in that arc. The writers realized Mandrakk being a scion of Perpetua does not fit with his original intent/vibe, and so he was restored to his rightful place.
__________________ ”You presume limits to my power. There are none.”
I”d recommend reading all 6 issues of infinite frontier, then reading all of Justice incarnate. Iirc Justice Incarnate #4 is the one that goes over the revamped cosmic history.
__________________ ”You presume limits to my power. There are none.”
To clarify, I enjoyed Justice League Incarnate. It's just that reading that guy's description about how JLI utterly recontextualized Mandrakk and I'm just like...
It”s very clear from the JLI comics that Mandrakk is NOT a servant of Perpetua, which is what was said about him in her arc. It”s also directly stated that Mandrakk was the manifestation of the GEB, which again is not something that was ever stated before.
It absolutely recontextualizes Mandrakk from the perspective of “he is a scion of Perpetua” to “He is the direct manifestation of GEB”
__________________ ”You presume limits to my power. There are none.”