The deck is pretty good overall with a more than reasonable power level and an interesting archetype
Cosmic crossover: The MTG Warhammer 40k decks With enough support around her - whether that's her fellow angels, or a stack of equipment attached to her - Aurelia hitting the table can often mean game over

Labs Aang's Journey Aang, Master of Elements Absolving Lammasu Acolyte of Aclazotz Adventurer's Inn Adventurous Eater Aerith Gainsborough Agate-Blade Assassin Ajani's Pridemate Al Bhed Salvagers Alley Assailant Alquist Proft, Master Sleuth Amalia Benavides Aguirre Ancestor Dragon Anchovy & Banana Pizza Ancient Cornucopia Angel of Vitality Ant-Man's Army Apothecary Stomper Arabella, Abandoned Doll Arbiter of Woe Archway Angel Ark of Hunger Armored Kincaller Arnyn, Deathbloom Botanist Asgardian Citadel Aunt May Aurelia, the Law Above Authority of the Consuls Avengers Hangar Ayli, Eternal Pilgrim Bagel and Schmear Bake into a Pie Balamb T-Rexaur Bandit's Talent Basilica Stalker Basilisk Collar Battle Menu Beza, the Bounding Spring Birnin Zana Plaza Bishop's Soldier Blech, Loafing Pest Blood Hustler Bloodfell Caves Bloodthirsty Conqueror Bloomvine Regent Blossoming Sands Boggart Mischief Bogwater Lumaret Bounding Felidar Bristlebud Farmer Bumbleflower's Sharepot Cache Grab Candy Trail Canyon Crawler Carrot Cake Case of the Uneaten Feast Cat Collector Cauldron of Essence Cautious Survivor Charming Prince Chrome Companion Circle of Power City Pigeon Clay-Fired Bricks Cloudblazer Colossus of the Blood Age Comforting Counsel Commune with Evil Compassionate Healer Consuming Sepulcher

The reasons for this change are suspect
It isnt even good in a Spirit deck due to being a sorcery, so there isnt even the fringe benefit of avoiding a more destructive board wipe without also having a card like Leyline of Anticipation in play