Five Color Ally Asshole (Casual)

Early Game: Get a solid mana base setup while play Ondu Cleric to gain life, Harahaz Druid to mana ramp/blend, and any other low drop card they'll either make you OP, piss your opponent/opponents off, or both.

Mid-Game: Play multiple Allies on each turn to mill you opponent, gain an absurd amount of life, and beef up your team. Descendant's Path should play a HUGE role in this if drawn. If not, Sea Gate Loremaster is your new best friend.

Late Game: At this point you should have multiple Allies out on the field, milled your opponent to near death, or have build up a mountain of life. All you need to do is play one more Ally and your opponent should either concede and burn their cards, or take a huge hit to the face when you swing all out because your life total is in the triple digits. RIP Opponent.

This may be my favorite deck I've build. I've milled over 30 cards and gained over 50 life on one turn. IF your opponents let you get to the late game, you're practically unstoppable.