[Empire in Ruins] Spirit Walk Spell is referenced but doesn't exist

[moo-man]

In Triumph of the Gravelord (GpCZEOY8AzPyywmP), under The Old School Spirits, it states that Gräber casts a Spell called Spirit Walk on himself that makes him Ethereal. This Spell doesn't seem to exist in the module, though it's defined in the PDF of the same content. I would copy the Spell here, but I think that would be breaking some rule about sharing the contents of the book.
From: mighty_chebo
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