mtg cards in graveyard gain flashback Snapcaster Mage (Regional PTQ) [Pro Tour Promos] Target instant or sorcery card in your graveyard gains flashback until end of turn Flashback [SGL-MTG-SOS2-333-ENF]

You get to choose of course, though the trade off seems worth it

Green has reasonable access to card draw, its got the best creatures, the best ways to gain a mana advantage, and its even got decent removal with fight effects like Primal Might and artifact and enchantment hate like Nature's Claim

Cost reduction and card advantage on a 2-drop is quite powerful

I've said too much, haven't I

Arcades was unfortunately killed by the planeswalker Kristina of the Woods, who hasnt seen print and is only mentioned in the Wayfarer comic series by Jeff Gomez

This doesn't hurt your mana too much since it can give you the mana you need for spells, which you're going to have a ton of -- and it can permanently become a creature in the late game