Tariel

Lots of Haste sources, ways to untap Tariel, and ways to protect Tariel.
Since I have so many Haste sources, I added some creatures with tap abilities.

General (1):
Tariel, Reckoner of Souls

Creatures (23):
Jawbone Skulkin Boros Guildmage Brion Stoutarm Sootstoke Kindler Avatar of Woe Bloodline Keeper Kalitas, Bloodchief of Ghet Visara the Dreadful Crimson Mage Dragon Mage Hellkite Charger Kamahl, Pit Fighter Kiki-Jiki, Mirror Breaker Rage Weaver Urabrask the Hidden Viashino Heretic Whip Sergeant Adarkar Valkyrie Aegis Angel Deathless Angel Mikaeus, the Lunarch Pentarch Paladin Village Bell-Ringer

Spells (32):
Akroma's Memorial Darksteel Plate Eldrazi Monument Helm of Kaldra Jandor's Saddlebags Lightning Greaves Magewright's Stone Memory Jar Necropouncer Obsidian Battle-Axe Puppet Strings Shield of Kaldra Strider Harness Swiftfoot Boots Sword of the Paruns Sword of Vengeance That Which Was Taken Thornbite Staff Thousand-Year Elixir Umbral Mantle Aggravated Assault Breath of Fury Chandra Ablaze Fervor In the Web of War Wheel of Fortune Elspeth, Knight-Errant Gleam of Resistance Indestructibility Roar of the Kha To Arms! Wheel of Fate

Mana Acceleration (8):
Alloy Myr Gold Myr Iron Myr Leaden Myr Lotus Guardian Palladium Myr Scuttlemutt Weathered Wayfarer

Lands (36):
Badlands Scrubland Plateau Blood Crypt Godless Shrine Sacred Foundry Rakdos Carnarium Orzhov Basilica Boros Garrison Graven Cairns Fetid Heath Rugged Prairie Dragonskull Summit Isolated Chapel Clifftop Retreat Bloodstained Mire Marsh Flats Arid Mesa Sulfurous Springs Caves of Koilos Battlefield Forge Command Tower Hall of the Bandit Lord Lavaclaw Reaches Reflecting Pool Spinerock Knoll Sunhome, Fortress of the Legion Windbrisk Heights Swamp Swamp Mountain Mountain Plains Plains Plains Sol Ring