After you get more experience, you can try "splashing" for a color, which is where you play just one or two cards of a third color in your deck
Fate Reforgeds Dash ability allows you to cast a creature for an alternate cost and, if you do, it gains haste
Sneak and Show would be a bit slower, but might be playable in some form since turn two Emrakul, the Aeons Torn or Griselbrand will always be good
This is how Golgari reanimator starts competing in a meta
This can get mana intensive and you have to be careful how you use it since unearth exiles the creature, nevertheless you an set up come explosive turns with this
Now take those products you opened, and check, did you come across any of the most expensive commons or valuable basic lands