mtg plains cards Type: Land, Subtype: Mountain, AND, Plains, 11 Plains [SGL-MTG-MSH-287-ENF]

My guess is that Amulet of Safekeeping is R&Ds attempt to try and answer the question of how to ensure that Modern players can sideboard against multiple strategies at once so that your progression though a large Modern tournament is less matchup dependent

Ezuri, Claw of Progress Simic +1/+1 counters is an archetype with a long and rich history of support, and Ezuri, Claw of Progress does an excellent job leading the charge

Red Playable Cards : Shatterskull Smashing is probably the second best of the Mythics

One of the chasi-est of chase cards in the precons might well be Goldlust Triad, a myriad Dragon that makes treasures on hitting