Every color is getting its own unique legendary dragon in Dungeons & Dragons: Adventure in the Forgotten Realms and the cycle of mono-colored monstrosities are all Mythic Rare quality as well
Chulane, Teller of Tales is probably the most popular land-fetching commander

1 Space Marine Devastator 1 Ultramarines Honour Guard 1 Vexilus Praetor 1 Zephyrim 1 Vanguard Suppressor 1 Belisarius Cawl 1 Company Commander 1 Epistolary Librarian 1 Inquisitor Eisenhorn 1 Neyam Shai Murad 1 The Golden Throne 1 Sanguinary Priest 1 Deny the Witch 1 Primaris Chaplain 1 Entrapment Maneuver 1 Utter End 1 Reconnaissance Mission 5 (13) 1 Marneus Calgar 1 Celestine, the Living Saint 1 Triumph of Saint Katherine 1 Sister of Silence 1 Primaris Eliminator 1 Birth of the Imperium 1 The Flesh Is Weak 1 Sister Repentia 1 Knight Paladin 1 Redemptor Dreadnought 1 Grey Knight Paragon 1 Thunderwolf Cavalry 1 Fell the Mighty 7 (4) 1 Exterminatus 1 Reaver Titan 1 Deploy to the Front 1 Hour of Reckoning Common (30) 1 Mind Stone 1 Arcane Signet 1 Commander's Sphere 1 Command Tower 1 Dismal Backwater 1 Evolving Wilds 1 Path of Ancestry 1 Scoured Barrens 1 Terramorphic Expanse 1 Tranquil Cove 5 Island 7 Swamp 8 Plains Uncommon (19) 1 And They Shall Know No Fear 1 Grey Knight Paragon 1 Space Marine Scout 1 Thunderwolf Cavalry 1 Sicarian Infiltrator 1 Sanguinary Priest 1 Deny the Witch 1 Primaris Chaplain 1 Swords to Plowshares 1 Reconnaissance Mission 1 Mortify 1 Skullclamp 1 Sol Ring 1 Talisman of Dominance 1 Talisman of Hierarchy 1 Talisman of Progress 1 Arcane Sanctum 1 Ash Barrens 1 Memorial to Glory Rare (49) 1 Celestine, the Living Saint 1 Defenders of Humanity 1 For the Emperor

Most experienced MTG players will agree that 17 is the optimal number of lands to put in your 40-card deck, as that will maximize your chance of being able to play all your cards
The Japanese release is the second of the XY Era
Scryfall (t:basic, unique:art) is fantastic for sorting by set and artist, and Basic Land Art is perfect for themes and planes