Prerequisites: You control Hullbreaker Horror and have the two necessary artifactsin hand, in play, or some mix thereof is okay
Two tribes my friends, two tribes
But overall, it seems to generate excitement and bring in new players who might have been lured by the anime style
Jared Carthalion This five-drop planeswalker can be your Commander and then has 5 loyalty, and then you can +1 him to make an all colors 3/3 Kavu token to block or swing, and then you can -3 him to choose up two dorks you control and then toss a counter on them for each color - so that's two 8/8s after making two
Uthros might not be an artifact, but its part of the Planet cycle in the main set, and that means it gets better when you put on charge counters
There are many Leader cards to choose from, but as new booster sets release, some are bound to stand out more than others, producing a growing and evolving meta