Finally, the stars and celestial bodies dotted around give the impression of a vast, open universe that the dragon can roam around freely
They kind of go hand-in-hand for the most part, and while there's still a few non-humans in here, they generally seem fewer overall and fit the theme more (see Conclave Mentor for a solid example here)

Enhanced Evolution Deck List Commander (1) Otrimi, the Ever-Playful Planeswalkers (1) 1 Nissa, Steward of Elements Creatures (38) 1 Zaxara, the Exemplary 1 Cazur, Ruthless Stalker 1 Ukkima, Stalking Shadow 1 Souvenir Snatcher 1 Tidal Barracuda 1 Boneyard Mycodrax 1 Mindleecher 1 Capricopian 1 Sawtusk Demolisher 1 Archipelagore 1 Dreamtail Heron 1 Pouncing Shoreshark 1 Cavern Whisperer 1 Chittering Harvester 1 Insatiable Hemophage 1 Auspicious Starrix 1 Glowstone Recluse 1 Migratory Greathorn 1 Boneyard Lurker 1 Trumpeting Gnarr 1 Beast Whisperer 1 Genesis Hydra 1 Hungering Hydra 1 Masked Admirers 1 Predator Ooze 1 Vastwood Hydra 1 Vorapede 1 Cold-Eyed Selkie 1 Wydwen, the Biting Gale 1 Silent Arbiter 1 Fertilid 1 Illusory Ambusher 1 Mulldrifter 1 Shriekmaw 1 Heroes Bane 1 Reclamation Sage 1 Yavimaya Dryad 1 Trygon Predator Spells (14) 1 Deadly Rollick 1 Migration Path 1 Dredge the Mire 1 Mind Spring 1 Deadly Tempest 1 Profane Command 1 Animists Awakening 1 Find // Finality 1 Gaze of Granite 1 Villainous Wealth 1 Kodamas Reach 1 Beast Within 1 Krosan Grip 1 Putrefy Artifacts (5) 1 Manascape Refractor 1 Bonders Ornament 1 Lifecrafters Bestiary 1 Arcane Signet 1 Sol Ring Enchantments (4) 1 Psychic Impetus 1 Parasitic Impetus 1 Predatory Impetus 1 Propaganda Lands (37) 1 Darkwater Catacombs 1 Endless Sands 1 Exotic Orchard 1 Llanowar Wastes 1 Sunken Hollow 1 Blighted Woodland 1 Command Tower 1 Dimir Aqueduct 1 Golgari Rot Farm 1 Mortuary Mire 1 Myriad Landscape 1 Opulent Palace 1 Rogues Passage 1 Simic Growth Chamber 1 Soaring Seacliff 1 Temple of the False God 1 Dismal Backwater 1 Jungle Hollow 1 Thornwood Falls 5 Swamp 1 Forest 2 Island Kalamax, the Stormsire in Ruthless Regiment Kalamax, the Stormsire is focused on copying your instant and sorcery spells

you want to try and stay above 11 life until you know that you can move in on the Shadow plan safely
It's bad manners at some tables, but honestly, a card like Ruination is absolutely backbreaking against your opponents