For a cost of 2WW, Luminous Broodmoth is well worth getting out as early as you can, providing protection through recursion and making your heaviest hitters that much more evasive
You hit your opponent, and now you have an extra attack step
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions (such as that of Serpent of the Pass's second ability)
They are one of my favorite parts about deckbuilding, and I think they are one of the strongest storytelling components in the entire game
From dropping random previews on characters' birthdays to showcasing Kekfa's and Sephiroth's art on the main floor at PAX East, Wizards knows how to get people excited
A couple of the most noteworthy include the problem of trying to cram support for 10 guilds into one small MTG set and the perceived pullback in power level, especially when compared to Return to Ravnica and Gatecrash