I'm gonna guess peasant tournaments mean you're not allowed to use rares? because if so, this deck looks very solid!
the only thing i see that is problematic that you're missing is journey to nowhere
. That card is so powerful for removal.
other cards to consider are condemn
, khemba sky guard, and jace's ingenuity
try some of those out and see what happens, but the deck looks very strong for what it is right now