Boast, Mentor, Raid, plus a few Training cards.
This initial deck idea is pretty weak to base upon. It needs extra combats, but also needs extra mana for those combats, so I did an unusual thing (for me) and simply dumped some Time Walks in there. I usually avoid Time Walks, but this deck is pretty weak, and likely takes pretty fast turns, so I think it's probably OK.
Click here for a text version of this decklist
Click here for my EDH Commander decks