I had all of the possible cards for this game unlocked before the expansion came out. Since then, after playing through the expansion content, I've used a Bant Keeper deck to win some online matches and acquire the "battle boosters." Now I'm all caught up and have 100% of the card collection. I want to make some better decks. You should help me. Here's what I have to work with... White: 3x Elite Vanguard 4x Kitesail Apprentice 4x Selfless Cathar 4x Trained Caracal 4x Loyal Pegasus 4x Akrasan Squire 4x Cloudshift 4x Righteous Blow 4x Swift Justice 4x Gods Willing 2x Stoneforge Mystic 2x Hero of Iroas 3x Ajani's Pridemate 3x Wall of Omens 3x Sigiled Paladin 3x Ordeal of Heliod 3x Reprisal 3x Glory Seeker 4x Squadron Hawk 4x Lone Missionary 4x Leonin Snarecaster 4x Knight of the Skyward Eye 4x Nimbus Wings 4x Raise the Alarm 1x Brimaz, King of Oreskos 2x Mentor of the Meek 3x Banisher Priest 4x Attended Knight 4x Standing Troops 4x Arrest 4x Asha's Favor 4x Safe Passage 4x Solemn Offering 2x Rhox Faithmender 2x Seance 3x Mausoleum Guard 3x Paragon of New Dawns 3x Phantom General 3x Armored Ascension 3x Angelic Accord 3x Sanctum Gargoyle 3x Kor Cartographer 4x Assault Griffin 4x Marked by Honor 4x Inspired Charge 4x Divine Verdict 1x Baneslayer Angel 2x Battlegrace Angel 4x Thraben Purebloods 4x Meditation Puzzle 4x Angelic Edict 2x Aegis Angel 2x Palisade Giant 2x Planar Cleansing 4x Triplicate Spirits 2x Resolute Archangel 3x Seraph of the Masses Blue: 2x Quicken 3x Hedron Crab 4x Kraken Hatchling 4x Cloudfin Raptor 4x Triton Shorestalker 4x Vapor Snag 4x Fleeting Distraction 4x Tome Scour 4x Void Snare 4x Artful Dodge 3x Quickling 3x Military Intelligence 4x Etherium Sculptor 4x Maritime Guard 4x Doorkeeper 4x Courier's Capsule 4x Ior Ruin Expedition 4x Voyage's End 4x Think Twice 4x Negate 4x Nullify 2x Chasm Skulker 3x Esperzoa 4x Guard Gomazoa 3x Niblis of the Breath 3x Dissolve 3x Chill of Foreboding 4x Frost Lynx 4x Wind Drake 4x Blind Phantasm 4x Coral Barrier 4x Pestermite 4x Brackwater Elemental 4x Scroll Thief 4x Hysterical Blindness 2x Talrand, Sky Summoner 2x Jalira, Master Polymorphist 2x Bident of Thassa 3x Phantasmal Dragon 3x Paragon of Gathering Mists 4x Breaching Hippocamp 4x Archaeomancer 4x Moon Heron 4x Inspiration 1x Time Warp 2x Mercurial Pretender 3x Switcheroo 4x Surrakar Banisher 4x Traumatic Visions 1x Soul of Ravnica 2x Sharding Sphinx 2x Roil Elemental 2x Mahamoti Djinn 2x Counterlash 3x Horizon Scholar 4x Thassa's Bounty 3x Kraken of the Straits Black: 2x Cruel Sadist 3x Tormented Hero 3x Quest for the Gravelord 3x Ulcerate 3x Suffer the Past 4x Asphodel Wanderer 4x Death Cultist 4x Pharika's Chosen 4x Dead Weight 4x Deviant Glee 4x Demonic Appetite 4x Undying Evil 2x Bloodghast 4x Glaze Fiend 4x Child of Night 4x Walking Corpse 4x Blister Beetle 4x Drudge Skeletons 4x Vicious Hunger 2x Death Baron 2x Agent of the Fates 3x Tribute to Hunger 4x Giant Scorpion 4x Necromancerâ€™s Assistant 4x Liliana's Specter 4x Bloodflow Connoisseur 4x Corpse Blockade 4x Phyrexian Rager 4x Devouring Swarm 4x Drag Down 4x Assassinate 4x Mind Rot 4x Dead Reckoning 2x Graveborn Muse 3x Paragon of Open Graves 3x Scavenger Drake 3x Cutthroat Maneuver 4x Accursed Spirit 4x Gravedigger 4x Viscera Dragger 4x Ogre Jailbreaker 4x Rotted Hulk 1x Shadowborn Demon 2x Indulgent Tormenter 2x Sanguine Bond 2x Monomania 3x Rescue from the Underworld 4x Rotfeaster Maggot 4x Shadowcloak Vampire 4x Flesh to Dust 2x Nightmare 2x Blood Tribute 3x Maalfeld Twins 2x Rune-Scarred Demon 4x Covenant of Blood 1x Griselbrand 3x Skeletal Wurm Red: 2x Banefire 3x Quest for the Goblin Lord 3x Coordinated Assault 4x Goblin Arsonist 4x Foundry Street Denizen 4x Goblin Bushwhacker 4x Satyr Hoplite 4x Furor of the Bitten 4x Shock 4x Burning Inquiry 3x Hellspark Elemental 3x Volcanic Geyser 3x Skullcrack 4x Goblin Shortcutter 4x Bloodcrazed Neonate 4x Kiln Fiend 4x Inferno Fist 4x Maniacal Rage 4x Fling 4x Krenko's Command 2x Goblin Rabblemaster 2x Anger of the Gods 3x Guttersnipe 3x Rakish Heir 3x Rockslide Elemental 3x Cunning Sparkmage 4x Regathan Firecat 4x Two-Headed Cerberus 4x Wandering Gobins 4x Lightning Talons 4x Raid Bombardment 4x Seismic Strike 4x Trumpet Blast 4x Resounding Thunder 4x Act of Treason 4x Bolt of Keranos 2x Ogre Battledriver 3x Brood Keeper 3x Paragon of Fierce Defiance 3x Tectonic Rift 4x Marauding Maulhorn 4x Vent Sentinel 4x Thorn-Thrash Viashino 4x Russet Wolves 4x Portent of Betrayal 4x Demolish 1x Stormbreath Dragon 2x Wrecking Ogre 2x Burning Anger 4x Pitchburn Devils 1x Inferno Titan 2x Charmbreaker Devils 2x Shivan Dragon 2x Warstorm Surge 3x Blood Feud 4x Explosive Impact 2x Siege Dragon Green: 3x Primal Bellow 4x Elvish Pioneer 4x Spire Tracer 4x Young Wolf 4x Wild Nacatl 4x Gather Courage 4x Fog 4x Prey Upon 2x Genesis Hydra 3x Jade Mage 4x Elvish Visionary 4x Timberland Guide 4x Satyr Wayfinder 4x Wandering Wolf 4x Naturalize 4x Titanic Growth 2x Elder of Laurels 2x Scion of the Wild 2x Beastmaster Ascension 3x Reclamation Sage 3x Triumph of Ferocity 4x Grazing Gladeheart 4x Battering Krasis 4x Advocate of the Beast 4x Aura Gnarlid 4x Grave Bramble 4x Matca Rioters 4x Cultivate 1x Vengevine 3x Paragon of Eternal Wilds 3x Spore Burst 4x Saruli Gatekeepers 4x Nylea's Disciple 4x Primal Huntbeast 4x Mold Shambler 4x Chorus of Might 4x Living Destiny 4x Hunt the Weak 2x Mycoloth 2x Arbor Colossus 2x Doubling Season 3x Hunter's Prowess 3x Garruk's Packleader 3x Spider Spawning 3x Enlarge 3x Mischief and Mayhem 4x Nessian Asp 4x Stomper Cub 4x Beacon Behemoth 1x Soul of Zendikar 2x Terra Stomper 2x Phytotitan 3x Nemesis of Mortals 3x Howlgeist 4x Sylvan Bounty 3x Pelakka Wurm 4x Siege Wurm Multicolored: 1x Maelstrom Archangel 3x Fusion Elemental 3x Tower Gargoyle 3x Rhox War Monk 1x Rafiq of the Many 3x Skymark Roc 4x Esper Cormorants 3x Vizkopa Guildmage 3x Woolly Thoctar 3x Truefire Paladin 4x Selesnya Evangel 4x Sigil Blessing 3x Elder Mastery 4x Tidehollow Strix 3x Dinrova Horror 4x Goblin Electromancer 3x Species Gorger 3x Spreading Thrinax 1x Kresh, the Bloodbraided 4x Kathari Bomber 4x Auger Spree 3x Treasured Find 3x Ground Assault 4x Gorger Wurm Colorless: 2x Pyxis of Pandemonium 3x Hot Soup 3x Darksteel Axe 3x Elixir of Immortality 4x Adventuring Gear 4x Traveler's Amulet 2x Illusionist's Bracers 3x Millstone 3x Warmonger's Chariot 4x Cobbled Wings 4x Armillary Sphere 2x Hall of Triumph 3x Gargoyle Sentinel 3x Greatsword 3x Blasting Station 3x Darksteel Ingot 2x Avarice Amulet 3x Galvanic Juggernaut 3x Manaforce Mace 2x Creepy Doll 3x Meteorite 3x Obelisk of Alara 2x Sphinx-Bone Wand 1x Kozilek, Butcher of Truth Land: 3x Jungle Shrine 3x Arcane Sanctum 3x Crumbling Necropolis 3x Savage Lands 3x Seaside Citadel 4x Azorius Guildgate 4x Izzet Guildgate 4x Rakdos Guildgate 4x Selesnya Guildgate 4x Boros Guildgate 4x Dimir Guildgate 4x Gruul Guildgate 4x Simic Guildgate 4x Golgari Guildgate 4x Orzhov Guildgate 4x Radiant Fountain Decks can also use basic lands, of course. I compiled that list myself from the card list in the game (I checked, but I couldn't find anyone else online who had already typed the full list up). It's a pretty big list, so it might not be perfect, but it's pretty close.

What kind of deck are you trying to make? If you're trying to win, I don't know what competitive metagame is like, but it looks like W, B, and G, in that order, have the strongest cards.

Yes, I'm trying to win. I don't know what the competitive metagame is like either. I'm too lazy to find out. I want someone else to build the deck for me so that I can play it and win. But I guess that's not very likely...