Top recommendations Golden Fluid and Model Air, can be used straight out of the box with their thin density, you can easily mix and apply to the card
Then there are three or four cost ones like Read the Bones that add an effect like digging four (Bitter Revelation) or scrying two (Read the Bones)
Lets get on with the show
I probably play more enters-the-battlefield tapped lands than most folks, since my local environment with the other RC members is pretty slow, so I see how Tiller Engine might be something that I get a little extra mileage from
Fifth Dawn is not a great Limited set on its own, but it played really well in draft as a third pack expansion
This makes sense: mono black is sure to have plenty of kill spells, and this deck needs as much ramp as it can get to bring out its absurd nine mana commander, especially since he's going to be a lightning rod for removal, Ward cost aside