People generally feel, if they had a chance to compete in the game, or to at least break up the combo, it's OK
Claim the Kingdom Consecrate Land Crackling Emergence Darkmoss Bridge Darksteel Citadel Darksteel Garrison Dreadwurm Drossforge Bridge Goldmire Bridge Harmonious Emergence Kamahl, Heart of Krosa Kefnet the Mindful Keranos, God of Storms Klothys, God of Destiny Mistvault Bridge Monument to Perfection Nissa, Who Shakes the World Plaza of Heroes Razortide Bridge Rustvale Bridge Sapling Nursery Silverbluff Bridge Slagwoods Bridge Smuggler's Surprise Soul of Windgrace Tanglepool Bridge Thornglint Bridge Tyrite Sanctum Vivien Reid
The only reason she isn't the most expensive is that there are Iconic cards in the set
Unstable Amulet This red artifact seems pretty awesome in Ruby Storm
I've got a few extra bits and pieces to deal with organization, bulk, and color coding in my setup as well (more on that below), but if you're starting out as cheap as you can, you only really need the first two items on this list