Release date: 2009-02-06 Absorb Vis Aerie Mystics Ancient Ziggurat Apocalypse Hydra Armillary Sphere Asha's Favor Aven Squire Aven Trailblazer Banefire Beacon Behemoth Blood Tyrant Bloodhall Ooze Bone Saw Brackwater Elemental Canyon Minotaur Celestial Purge Charnelhoard Wurm Child of Alara Cliffrunner Behemoth Conflux Constricting Tendrils Controlled Instincts Corrupted Roots Countersquall Court Homunculus Cumber Stone Cylian Sunsinger Dark Temper Darklit Gargoyle Drag Down Dragonsoul Knight Dreadwing Elder Mastery Ember Weaver Esper Cormorants Esperzoa Ethersworn Adjudicator Exotic Orchard Exploding Borders Extractor Demon Faerie Mechanist Fiery Fall Filigree Fracture Fleshformer Font of Mythos Frontline Sage Fusion Elemental Giltspire Avenger Gleam of Resistance Gluttonous Slime Goblin Outlander Goblin Razerunners Grixis Illusionist Grixis Slavedriver Gwafa Hazid, Profiteer Hellkite Hatchling Hellspark Elemental Ignite Disorder Infectious Horror Inkwell Leviathan Jhessian Balmgiver Kaleidostone Kederekt Parasite Knight of the Reliquary Knotvine Mystic Kranioceros Lapse of Certainty Maelstrom Archangel Magister Sphinx Malfegor Mana Cylix Manaforce Mace

Compared with most modern expansions, Obsidian Flames remains relatively inexpensive
We separated the allowed and not allowed examples
Whats more, it has convoke, so youll cast it for 3-4 mana most of the time
An extra turn, a battlefield sweeper, and a reanimation spell stapled to a removal spell are all solid effects in the format, but the condition of having a legendary creature or planeswalker in play to cast them makes them just awkward enough that many people choose not to play them
The perfect combo for quick readability, and tactile enough for card handling and shuffling