And then you either ramped, drew, and now you have a dork to block, die to a Skullclamp, grab a Sword of Fire and Ice to smash someone, or get bounced or flickered for another use
Hoard Hauler is a slam dunk for vehicle decks, but has applications outside of that, particularly in the emergent double strike space that many Boros decks are operating in
Meanwhile, the creature Solemn Simulacrum is a classic card in not only Commander (where it's good for mana fixing), but also in blue Tron builds
but the controller needs to pay 2 mana to untap the creature
Kain is a good early play that can guarantee you the top-ups you need, and you can do some dastardly things with him, like building him tall and strapping a Vampiric Link to him to ensure you gain life off of anyone attacking with him
This is where your cards which choose or chosen suddenly become great