Nezumi Graverobber, maybe?
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If you equip the hypnotic specter with a viridian longbow, you can use that ability during your opponents draw step, and your opponent will only be able to play instants for the rest of the game if they can't break it. Pretty funny, actually.
Chittering Rats, Konda's Banner, Coat of Arms and either of the flip Rats would work well here.
I'm not sure, but I think a Reiver Demon or two would own in your deck.
Alright, with the added mana I should expect 2.91 lands in my opening hand, which'll pay for most things.
How about Lodestone Myr or Suntouched Myr?
I can't see a possible use for the bounce drawback of Eiganjo Free-Riders. Am I missing something?
This isn't Highlander, but anyway ...
Can you actually lose by not being able to draw a hand of 7 cards?
Something like that?