Steve Blum autographed Mortal Kombat Funko Pop figure 536 as Sub-Zero hand signed in blue paint pen and inscribed Stay Frosty. This signature has been authenticated by JSA James Spence authentication Certification Number: NN35561 and will come with the matching cert card you see in the scan. The Pop will come in a plastic protector case. Buy with confidence we have been selling in-person autographs since 1992. Funko Pop