This amazing sketch of Serpenta from SENTINELS was drawn by Alex Riegel at the 2011 Wizard World Philly Comicon. As soon as I saw Alex's work, I was blown away. His sketches have a lot of energy and life in them. I love the extra detail Alex puts into his figures and background too. So cool! He's also a super nice guy and seems to love drawing. Please check out more of Alex's work here.