You will need to have some basic lands in the deck for Fertile Footsteps, even though none are in the sample list
Trading cards that feature an outside border will have the artwork extended to cover the border
MTG.Design homepage MTG.Designs create-a-card page is simple and has top-to-bottom forms to fill out via various text boxes and drop boxes to complete your card
While that's not the most terrible idea, the likelihood in a Niv-Mizzet deck is that the other spell you're casting is a burn spell that could do the same, and I have to feel that you're going to be better off casting it by itself, rather than putting all your eggs in one basket
No one wants to have their The Ur-Dragon taken down by a 1/1 cast by for a single
Instead, the reason why this set was determined to be Modern legal, according to Rasmussen, is so as many MTG players can play with the cards from this set as possible