Knowing your matchups, when to commit, and when to retreat wins more games than flashy cards
In fact, Crackling Doom is so good that I wound up not wanting Heros Downfall, a card that has been in every black midrange deck, at all anymore

Synthoids Aang and La, Ocean's Fury Aang, A Lot to Learn Aang, Air Nomad Aang, Airbending Master Aang, Destined Savior Aang, Master of Elements Aang, the Last Airbender Aardvark Sloth Abbey Gargoyles Abbey Griffin Abbey Matron Abbot of Keral Keep Abdel Adrian, Gorion's Ward Aberrant Aberrant Manawurm Abolisher of Bloodlines Abomination, Irradiated Brute Abomination, Terrifying Titan Abomination, World Ravager Aboroth Absolver Thrull Absolving Lammasu Absorbing Man and Titania Abstract Iguanart Abstruse Archaic Abu Ja'far Abuna Acolyte Abundant Maw Abzan Battle Priest Abzan Beastmaster Abzan Falconer Abzan Kin-Guard Abzan Skycaptain Academy Manufactor Academy Raider Academy Rector Acclaimed Contender Accomplished Alchemist Accomplished Automaton Accorder Paladin Ace, Fearless Rebel Acid Web Spider Acidic Slime Acidic Slime Acolyte Hybrid Acolyte of the Inferno Acridian Acrobatic Cheerleader Action News Crew Adamaro, First to Desire Adanto Vanguard Adaptive Automaton Adaptive Gemguard Adaptive Shimmerer Adaptive Snapjaw Adaptive Sporesinger Adarkar Sentinel Adarkar Unicorn Adarkar Valkyrie Adder-Staff Boggart Adelbert Steiner Adeline, Resplendent Cathar Adeline, Resplendent Cathar Ademi of the Silkchutes Adept Watershaper Adherent of Hope Adipose Offspring Admonition Angel Adorable Kitten Adorned Pouncer Adrenaline Jockey

Shroud is a protection that is a double-edge sword, but because this card gives it to all creature until you upkeep, youre using that other edge against your opponents
Getting The Glimmers [characters] to look right and trying to keep them on-model is a challenge, and youve got to take these characters and put them in completely different poses