Ok i attempted to fix this but still getting an error, you'll have to excuse me but my experience in xml is little.
Error now is: This page contains the following errors:error on line 6 at column 8: error parsing attribute name Below is a rendering of the page up to the first error.
Fixed code starting at line 5 ending at 13:
<card Id ="01">
<type name ="Boss">
<title>Gorgona</title>
<xp>500 XP</xp>
<treasureIcon>Treasure</treasureIcon>
<heading>Queen of Medusia</heading>
<levelUp>Level Up: Choose a Hero in town. Immediately kill that Hero and place it face-down in your scorekeeping area.</levelUp>
</type>
</card Id>
And thanks for helping love this site!