Which Box Should You Buy If you want to draft with friends, build a broad collection, and get the best per-pack value, a play booster box is the way to go

Arcane Sanctum Ash Barrens Battlefield Forge Bonders' Enclave Brushland Canopy Vista Chocobo Camp Choked Estuary Cinder Glade Clifftop Retreat Command Tower Contaminated Aquifer Darkwater Catacombs Demolition Field Desolate Mire Dragonskull Summit Drowned Catacomb Evolving Wilds Exotic Orchard Fetid Heath Fire-Lit Thicket Flooded Grove Foreboding Ruins Forest Forge of Heroes Fortified Village Furycalm Snarl Game Trail Geothermal Bog Glacial Fortress Graven Cairns High Market Hinterland Harbor Idyllic Beachfront Island Isolated Chapel Jungle Shrine Mossfire Valley Mountain Nesting Grounds Nomad Outpost Overflowing Basin Path of Ancestry Plains Port Town Prairie Stream Radiant Grove Rogue's Passage Rootbound Crag Rugged Prairie Sacred Peaks Scavenger Grounds Seaside Citadel Shadowblood Ridge Shineshadow Snarl Skycloud Expanse Slayers' Stronghold Smoldering Marsh Spire of Industry Sulfurous Springs Sungrass Prairie Sunken Hollow Sunken Ruins Sunlit Marsh Sunpetal Grove Sunscorched Divide Swamp Tangled Islet Temple of Enlightenment Temple of Mystery Temple of Plenty Temple of the False God

Cloud, Midgar Mercenary decks are very competitive in Duel Commander, or in the 99 with commanders like Phelia, Exuberant Shepherd or Quintorius, History Chaser
Legality depends on the tournament format -- Summon: Shiva can be legal in some formats and banned or restricted in others
(Sorry for that reminder!) Much like cycling, its name was chosen for a mechanical reason more than a flavorful one
every booster includes a Legendary card as well as its Echoverse alternative