Obviously Mana Leak hits more targets than Spell Pierce, which has Negate restrictions on it, they are not directly comparable cards
Special Illustration Rares appear roughly 1 in 80-90 packs, whilst Hyper Rares surface approximately 1 in 100-150 packs
Inferno deals 6 damage to each creature and each player

Okay, so heres how the deck ended up: Creatures (32) 1 Sakura-Tribe Elder 1 Solemn Simulacrum 1 Anger 1 Yavimaya Elder 1 Sylvan Safekeeper 1 Brawn 1 Vampire Hexmage 1 Pawn of Ulamog 1 Ulamog, the Infinite Gyre 1 Reassembling Skeleton 1 Sylvok Replica 1 Bloodsoaked Champion 1 Grim Haruspex 1 Ghoulcaller Gisa 1 Hangarback Walker 1 Zulaport Cutthroat 1 Tireless Tracker 1 Demon of Dark Schemes 1 Scrap Trawler 1 World Shaper 1 Pitiless Plunderer 1 Krav, the Unredeemed 1 Judith, the Scourge Diva 1 Mayhem Devil 1 God-Eternal Bontu 1 Elvish Reclaimer 1 Dockside Extortionist 1 Gilded Goose 1 Syr Konrad, the Grim 1 Korvold, Fae-Cursed King 1 Gingerbrute 1 Cauldron Familiar Lands (38) 5 Forest 1 Reflecting Pool 5 Swamp 1 Mountain 1 Phyrexian Tower 1 High Market 1 Dust Bowl 1 Overgrown Tomb 1 Stomping Ground 1 Blood Crypt 1 Twilight Mire 1 Jund Panorama 1 Savage Lands 1 Exotic Orchard 1 Dragonskull Summit 1 Rootbound Crag 1 Command Tower 1 Woodland Cemetery 1 Temple of Malady 1 Spawning Bed 1 Blighted Woodland 1 Hissing Quagmire 1 Canyon Slough 1 Path of Ancestry 1 Field of Ruin 1 Memorial to Folly 1 Memorial to Unity 1 Luxury Suite 1 Spire Garden 1 Fabled Passage Spells (30) 1 Exploration 1 Sol Ring 1 Artifact Mutation 1 Terminate 1 Ashnod's Altar 1 Skullclamp 1 Salvaging Station 1 No Rest for the Wicked 1 Greater Good 1 Lotus Petal 1 Tormod's Crypt 1 Damnation 1 Seal of Primordium 1 Deathrender 1 Cauldron of Souls 1 Ratchet Bomb 1 Nihil Spellbomb 1 Tragic Slip 1 Commander's Sphere 1 Wave of Vitriol 1 Ulvenwald Mysteries 1 Aetherworks Marvel 1 Revel in Riches 1 Brass's Bounty 1 Rhythm of the Wild 1 Cindervines 1 Force of Vigor 1 Moldervine Reclamation 1 Golden Egg 1 Witch's Oven And here are two handy charts courtesy of Archidekt, including that sweet, sweet mana curve broken out by color

Once the crow birdfolk realized augurs were using the shapes of their murmurations for divination, they decided to have some fun with it
Once Sentinel Sarah Lyons's battalion ability has triggered, it doesn't matter how many creatures are still attacking when that ability resolves