Propeller Pioneer features a new keyword: Fabricate. It means it enters the battlefield with the specified number of +1/+1 counters or the specified number of 1/1 Servo artifact creatures. In most circumstances, the 1/1 is preferable since it’s an extra body. Ovalchase Dragster is a new type of artifact. It’s a vehicle. This means that it’s not ordinarily a creature, and you must tap creatures with the specified number or more of power.
Architect of the Untamed features energy counters. Energy counters have appeared on a few cards so far, and they appear to be an extra resource that you can obtain and spend on different things. In this case, this creature has some solid stats and could be good in ramp decks to get 6/6s or to consistently get energy for something else.
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