Editing The Chronicles of Amber (section)

====The Pattern and the Logrus====
At the two poles of existence are the symbols of Order and Chaos—[[The Pattern (The Chronicles of Amber)|The Pattern]] and [[The Logrus]], respectively. Each, when negotiated, gives a person the ability to walk in shadow—across the different possible universes. The Pattern is a single, intertwined curve, laid out in a twisting labyrinth-like design, in size larger than a football field. The Logrus is described as a shifting, three-dimensional obstacle course. Amber's Pattern is located in caverns deep underneath the royal palace.

Initially, readers learn there is the Pattern in Amber, and copies in Rebma and Tir-na Nog'th. Later, more become evident: e.g., there are imperfect or "broken" copies in other Shadows, and that Amber's Pattern itself is a close shadow of a hidden Primal Pattern. These imperfect copies exist in shadows close to Amber, with the first three being the least dangerous to use, but with the danger increasing the further one is from the original. Navigating Broken Patterns can give an individual some access to magical energies, but it is "foolish" to attempt to use for such purposes any Broken Pattern further than the ninth one from Amber.

The Logrus is not introduced until the sixth book of the Amber series (''The Trumps of Doom'').<ref>{{Cite journal |last=Lindskold |first=Jane M. |author-link=Jane Lindskold |date=1992 |title=The Pervasive Influence of Poetry in the Works of Roger Zelazny |journal=[[Extrapolation (journal)|Extrapolation]] |volume=33 |issue=1 |pages=41–58 |doi=10.3828/extr.1992.33.1.41}}</ref> Merlin's walking of the Logrus appears in a prologue to the initial hardcover edition of the book.<ref>{{Cite web |title=Prologue to Trumps of Doom |url=http://www.e-reading.link/bookreader.php/73090/Zelazny_-_Prologue_to_Trumps_Of_Doom.html}}</ref> We do not see any other instances of a character negotiating the Logrus. The Prologue has Merlin bleeding and experiencing odd sensory inputs. Later we learn that walking the Logrus can leave one mentally unstable for a while afterwards, but this "usually" passes. The Logrus is also described as containing the skeletal remains of those who tried to walk it, but failed.