Duskmourn added a damage-multiplier, which I gushed about in my Red Set Review, but the Commander Deck one-upped it by adding a hasty, first-striking mana-doubler on a stick that damages players for tapping lands
You can have them enter the battlefield with haste and trample, which provides a huge and immediate threat that can swing a race, kill quickly, or surprise attack a planeswalker or battle
Myr Turbine Myr Turbine is fairly narrow with its tutoring ability, but putting myr like Myr Battlesphere into play is pretty powerful
There are several Inventor cards within the deck, with each one serving to buff the others while also working synergistically with items and locations
Im not normally one to love a deluge of out-of-context decklists, but in a new format the stream of raw ideas is crucial