Open Question: How old would you guess the artist of this drawing would be?

I'm 13 if you're wondering, just turned 13 2 months ago. But i want to know if this is good for my age. :P http://i47.tinypic.com/2cxvt06.jpg btw i know i messed up on the sword, the hand, some of the shading, and outlining. c: i know what i need to fix so please dont point those things out to me xD
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