A SAK appears in the hands of The Corinthian in the penultimate leg of Sandman,The Kindly Ones
Think it might be a Spartan 
That was the 'Serial Convention' story, right? It's only been 20 years since I read that. Wow.
No,that was the Origional Corinthian that Lord Morphious unmade.
The remade Corinthian uses the SAK first to rescue baby Daniel,then to try kill Matthew the raven(and fortunately fails)