(please be gentle, I'm new to mtg)
I like your deck (I've always thought a rat deck would be fun, and the discard mechanic seems nasty).
But I have some questions.
Usually a deck size is 60 cards, but I notice yours is 61 with only 19 swamps too. What's the reasoning behind that? To me it looks like you really wanted 2 non-land cards. Is that true? If so which were they and what were the trade offs?