This is because they can reliably find an Energy card when they need one with a Trainer card like Earthen Vessel
He'll let you prevent all damage that would be dealt to a target creature with a +1/+1 counter on it, useful if you've already got Kyler handing out counters like there's no tomorrow
Once you have both goblins in play, cast First Day of Class (you could grab a lesson if you like, ideally Introduction to Prophecy, but in most cases it doesn't matter)
Nexomon If you're looking for something that feels as close as you can get to Pokmon without the developer running the risk of legal issues, Nexomon is a great option
Supporter cards , on the other hand, tend to be more powerful but with the limitation that only one can be played per turn
702.170e: If an effect refers to plotting a card, it means performing the special action associated with a plot ability