With Staff you first make infinite green mana by tapping and untapping one of Archdruid, Marwyn(with 5 or more power), Priest of Titania, Circle or Wirewood Channeler
The deck was not just about attacking fast, as it could turn small characters into setup tools, reuse certain effects, and keep presenting threats in a way that made it hard for opponents to fully stabilize
That's an unusual effect for a Boros card, but also a very intriguing one, especially with Impact Tremors effects in play
For example, if the Vehicle is blocked by two creatures and it deals damage to each of them at the same time, the Crash Land ability will trigger only once
This effectively means you can stack the generation of tokens to copy something like Triplicate Titan, then make every other creature you own into that, creating a lethal board state in a single step
If some players love them and buy them, and Wizards makes a huge pile of money as a result, I see that as a good thing