You can only use each effect of "Evil HERO Inferno Wing - Backfire" once per turn.

Anathemancer Archfiend of Sorrows Artificer's Dragon Ashnod's Harvester Brackwater Elemental Canoptek Tomb Sentinel Chronomancer Cityscape Leveler Combat Courier Corpse Connoisseur Dregscape Sliver Dregscape Zombie Etherium Abomination Extractor Demon Fatestitcher Fire-Field Ogre First-Sphere Gargantua Ghost Ark Grixis Grixis Slavedriver Heavyweight Demolisher Hell's Thunder Hellspark Elemental Hexmark Destroyer Kathari Bomber Kathari Screecher Kederekt Leviathan Lokhust Heavy Destroyer Mask of the Jadecrafter Meticulous Excavation Mishra's Juggernaut Mishra's Research Desk Mishra, Tamer of Mak Fawa Molten Gatekeeper Perennial Behemoth Phyrexian Dragon Engine Platoon Dispenser Priest of Fell Rites Reconstructed Thopter Rotting Rats Royal Warden Salvation Colossus Scourge Devil Scrapwork Cohort Scrapwork Mutt Scrapwork Rager Sedraxis Specter Sedris, the Traitor King Shambling Remains Simian Simulacrum Skorpekh Lord Solemn Doomguide Terisian Mindbreaker Terror Ballista Tocasia's Onulet Tomb Blade Tri-Sentinel, Act of Vengeance Triarch Praetorian Undead Leotau Viscera Dragger Vithian Stinger Yotian Frontliner

There are a few other heavy hitters here, including some impressive Hop cards
Tannuk, Steadfast Second (Mythic) Grants haste to all your creatures and warp to your artifactsgreat for pushing damage and keeping the pressure up
Note: Promo cards included in this product cannot be used at official tournaments.
Though unassuming at first, when you consider that this applies to seven different cards and it costs just two ink, its a very good ability