Unlike the various members of the Justice League, who knew virtually nothing about Orsaga's power beyond a few scattered pieces of written information.
Even Constantine was not particularly certain about the various circumstances.
As a mage from the Marvel World.
Due to the rather unique nature of Ancient One's Spellcasting System.
She undoubtedly possessed a far deeper understanding of Orsaga's power.
Because, in essence, Spellcasters over there were the sort who took out loans.
Every spell a Spellcaster used came from some higher existence!
To use White Magic, one had to borrow power from the God of White Magic—Vishanti. To use Dark Magic, one generally had to borrow power from the God of Dark Magic—Chthon.
Thus, every time they cast a spell, the power they sought from those two was effectively a loan, the kind that had to be repaid with interest...
Among them.
Using White Magic was relatively manageable. Repayment was generally not too difficult, nor did it involve overly cruel methods.
Using Dark Magic, however, could very well involve all kinds of blood sacrifices or matters concerning souls. One careless misstep, and the Spellcaster himself would be thrown into the bargain.
And in this regard.
Aside from Vishanti and Chthon, other powerful beings such as the Crimson King—Orsaga—or the Lord of the Dark Dimension—Dormammu, could also serve as lenders for Spellcasters.
It was simply that.
Due to specializations and various other reasons, not many people borrowed from those two.
Therefore, as the Sorcerer Supreme, Ancient One naturally had a relatively clear understanding of Orsaga's power.
And.
Just as the world held not only the saying, "Borrow and repay, and borrowing again will not be hard," but also the entirely opposite saying, "I borrowed money by my own ability, so why should I repay it?"
Over in the Marvel