Notably, they can't try to remove creatures you control with power 2 or less to force you to discard
The Leylines are a set of enablers we didnt have in the original Theros block
All 50 cards have a Booster Fun version, and all rares and mythic rares have extended-art versions as well (available only in Collector Boosters)
Then the defending player guesses whether the mana value of that card is greater than the number of artifacts you control
Chief among them are the Jund Roots and Golgari Roots decks, which can flood the battlefield with Plant tokens
Ryan Sainio has an article of his favorites coming out today as well, so make sure to keep on the lookout for that this morning as well As always there is only so much I can say in one article, so if we missed one of your favorites, jump on over to Twitter to tell me or Ryan which Swamp you like best, and make sure you share an image of the art