Dual Decks!

No, not "DUEL" decks, "DUAL" decks!

I want you guys to make a deck that, after sideboarding, becomes a COMPLETELY different deck! Try to be especially creative with this challenge, that's what these kind of decks are supposed to be! :D

RULES!!!!!

1) The deck must be legal in some sort of format. Standard, Extended, Legacy, Vintage

2) The deck must include a 15-card sideboard (or else how will it transform silly? :P)

3) The deck must be at least semi-different after side-boarding. Like, changing RDW to Goblins after sideboarding doesn't seem very different to me. :/

Feel free to look at my deck for an example of what I mean if you need to.
http://www.mtgvault.com/ViewDeck.aspx?DeckID=141916

Have fun with this challenge guys, happy Magic-ing!!! ^_^