In my initial build, I decided to go with a more aggressive deck in the mold of Theros s Mono-Blue Devotion to see if Heliod is a worthy successor to the original Thassa
This card has a strong potential to wreak havoc in various Constructed formats
Coldsteel Heart is a solid mana rock in Commander that can tap for any color

Colorless Adaptive Automaton Gilded Lotus Maze's End Expedition Map Hedron Archive Swiftfoot Boots Basilisk Collar Cultivator's Caravan Darksteel Colossus Mazemind Tome Pyromancer's Goggles Ramos, Dragon Engine Steel Hellkite Crawling Barrens Temple of Abandon Temple of Deceit Temple of Enlightenment Temple of Epiphany Temple of Malady Temple of Malice Temple of Mystery Temple of Plenty Temple of Silence Temple of Triumph Ravenous Amulet Burnished Hart Heraldic Banner Meteor Golem 2 Bloodfell Caves 2 Blossoming Sands 2 Dismal Backwater 2 Evolving Wilds 2 Jungle Hollow Rogue's Passage 2 Rugged Highlands 2 Scoured Barrens 2 Swiftwater Cliffs 2 Thornwood Falls 2 Tranquil Cove 2 Wind-Scarred Crag Diamond Mare Feldon's Cane Fireshrieker Gate Colossus Sorcerous Spyglass Soul-Guide Lantern Three Tree Mascot Azorius Guildgate Boros Guildgate Cryptic Caves Demolition Field Dimir Guildgate Golgari Guildgate Gruul Guildgate Izzet Guildgate Orzhov Guildgate Rakdos Guildgate Selesnya Guildgate Simic Guildgate Arcane Signet Sol Ring Command Tower Sol Ring, Arcane Signet, and Command Tower are in traditional foil and have the FDC set code

The effect is quite interesting, where Infernal Denizen takes control of an enemy minion, but you need to sacrifice two swamps each turn
If you wanted to be in with a chance of getting any of these rare items or just one of the postcards, this would be the way to do it