What do these numbers mean, and how are they calculated

Advanced Search Sets Random Syntax Abandoned Sarcophagus Agonasaur Rex Airship Crash Akroma's Blessing Akroma's Vengeance Angel of the God-Pharaoh Angelsong Archfiend of Ifnir Architects of Will Astral Drift Aura Extraction Avian Oddity Backslide Bant Sojourners Barkhide Mauler Barren Moor Barrier Breach Basri, Tomorrow's Champion Benalish Partisan Beneath the Sands Blast from the Past Blasted Landscape Bloated Toad Boon of the Wish-Giver Bountiful Landscape Brand Break Asunder Canyon Slough Capital City Cast Out Censor Chitin Gravestalker Choking Tethers Cid, Timeless Artificer Clamorous Ironclad Claws of Wirewood Clear Cloud of Faeries Coastal Peak Compelling Argument Complicate Constricting Tendrils Contaminated Landscape Coordinated Charge Countervailing Winds Crystal Carapace Curator of Mysteries Darkwatch Elves Deadshot Minotaur Death Pulse Deceptive Landscape Decree of Annihilation Decree of Justice Decree of Pain Decree of Savagery Decree of Silence Deem Worthy Desert Cerodon Desert of the Fervent Desert of the Glorified Desert of the Indomitable Desert of the Mindful Desert of the True Detention Chariot Dirge of Dread Disciple of Grace Disciple of Law Disciple of Malice Dismantling Wave Dissenter's Deliverance Djeru's Renunciation Djeru's Resolve

When it connives this way, return up to one target spell to its owner's hand
Its impact on the games design and the advantage it gives to a player is cemented in Magic history
Jirachi looks poised for an attack, and the dark purple background helps to convey the intensity of the moment while still letting Jirachi's light color palette take center stage
It's for this reason that I decided instead of doing anything wacky or wild with him, that I would make this deck a Bracket 2 list