I already talked about how good I think these will be in Legacy at length last week, but I just wanted to mention here that between fetchlands, Serum Visions, Sleight of Hand and Gitaxian Probe, Modern also has most of the tools necessary to enable them, so I expect to see a splash there too, though maybe a slightly smaller one
Speaking of closing out the game, Rikku, Resourceful GuardianRikku, Resourceful Guardian can easily take advantage of the many ways we have to put counters on our creatures, granting us the chance to connect with them in combat
Thankfully, this spell will rarely cost you eight mana, as it has convoke, meaning that tapping your creatures will help reduce the cost of the spell
Goblin Sledder / Mogg Raider 8.5 I love to play both of these if I can
You find the full card list of the set here
Dwarves have a natural kind of affinity for cars, apparently, and so Lifecraft Engine provides extra synergies