It was not, however, without literary precedent.
The Oz story element in this comic would provide a literary precedent for this idea.
On top of their literary and mythological precedents, some scholars have argued that the immrama may be exaggerated retelling of historical voyages.
There are several literary precedents in science fiction for a "sword" of pure energy that can cut through anything, notably:
Huon self-consciously acknowledges literary precedent, and views the Arthurian world as bygone and thoroughly explored by his poetic masters.
Byron's epic poem has a host of literary precedents.
Duncan's quest, however, was internal, and she could find no literary precedent for expressing it.
There were, of course, literary precedents for this.
Spoken language had little to do with writing in an artificial classical style composed according to strict rules of poetics and rhetoric, and based upon literary precedent.
The Byronic hero sets a literary precedent for the modern concept of antiheroism.