A man used a Lord of the Rings replica sword to stab his sleeping girlfriend through the skull, an Adelaide jury has been told.
Prosecutor Mark Norman said Adam Alberi had repeatedly claimed his girlfriend had attacked him and accidentally stabbed herself in the head with the sharpened object.
"The prosecution say that explanation is as untrue as it is physically impossible and that he was in fact trying to kill her," he told the South Australian Supreme Court jury.
Alberi, 25, has pleaded not guilty to the attempted murder of Karina Todorashko, 27, in July 2013 at the unit they shared in Adelaide's inner south.
Mr Norman said the couple had argued and Ms Todorashko told him she was going to leave him.