There are lots of 0-mana artifacts in the game, like Moxen and Lotus Petal, even Memnite and Ornithopter
Quest for Ulas Temple can get a counter, you can set up Sapling of Colfenor for a massive attack of life gain and draw the card, you can find abilities for Skill Borrower, play it with Garruks Horde, haste it out with Impromptu Raid, find a use for Descendants Path, and so forth
Understatted, overcosted nightmare fuel
Two mana to put three lands into play tapped is incredibly powerful when you have turn one Amulet of Vigor
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The mantra of 'easy to learn, hard to master' has always driven Lorcana