This is basically useless against an aggressive red deck as by the time it kills anything you are one burn spell off dead

Aang, Destined Savior Akroma's Memorial Akroma, Angel of Wrath Akroma, Angel of Wrath Avatar Akroma, Vision of Ixidor Angelfire Ignition Animus of Predation Argivian Avenger Arlinn Kord Aurelia, the Law Above Aurelia, the Warleader Aurelia, the Warleader Awakened Skyclave Bull Cerodon Butcher of the Horde Cairn Wanderer Canoptek Tomb Sentinel Captain America, Team Leader Cerodon Yearling Commander Mustard Daredevil, Man Without Fear Dihada, Binder of Wills Dinosaurs on a Spaceship Djeru and Hazoret Earthbending Student Eater of Virtue Eiganjo Uprising Eivor, Battle-Ready Embodiment of Insight End-Raze Forerunners Ghost-Spider Gishath, Sun's Avatar Glacier Godmaw Goldvein Hydra Harmonious Emergence Haunted Cloak Hearthhull, the Worldseed Hercules, Prince of Power Heroes in a Half Shell Hit-Monkey Horde of Notions Howling Galefang Imodane's Recruiter Imodane's Recruiter Indominus Rex, Alpha Interplanar Brushwagg (playtest) Invasion of Kylem Jinnie Fay, Jetmir's Second Kamahl's Will Kamahl, Heart of Krosa Karvanista, Loyal Lupari Karvanista, Loyal Lupari Kasla, the Broken Halo Kelsien, the Plague Last Night Together Liberty Prime, Recharged Lightning Angel Loot, the Pathfinder Mabel, Heir to Cragflame Majestic Myriarch Mantis Rider Mechtitan Core Mothers Yamazaki (playtest) N'Yami-Class Mother Ship Nia, Fabled Skyclimber Nissa, Who Shakes the World Odric, Blood-Cursed Odric, Lunarch Marshal Path of Mettle Power Pack Questing Beast Ragnarok, Divine Deliverance

Baleful Strix is the only four-of creature in our deck, being fine on its own on Turn 2, offering a flying blocker for things like Delver of Secrets and also trading up for bigger creatures thanks to deathtouch but also being great in the late game with Panharmonicon, when its card-drawing enters-the-battlefield trigger doubles up
Add two mana to any card in your deck and suddenly you want it a whole lot less
Youre looking for proxies
Fortunately, it isn't quite as restricted, and you still have some good options when ignoring the plethora of colorless artifacts that work just as well if not better for accelerating your mana production