Colossal Skyturtle has a large body that protects itself on the board with Ward 2, and can be discarded using 1 of its 2 Channel abilities to either get a card back from your graveyard or bounce a creature
Nantuko Shadow and Cursed Scroll both work really well under these conditions, allowing you to keep using your mana efficiently turn after turn
So, let's draw some cards
Overwhelm with numbers: Urtet makes an efficient Commander when it comes to aggression, especially when players can tap into his buffs
Finally, we have Tezzeret, Master of the BridgeTezzeret, Master of the Bridge
While slightly overcosted for a 1/1, the warrior type will allow this creature to become a 2/2 or even a 3/3 pretty often