Picture this: You tap Chandra, Fire of Kaladesh (one damage), Lightning Strike your opponents face untapping Chandra, Fire of Kaladesh (four damage), tap Chandra, Fire of Kaladesh (five damage), use convoke to cast Stoke the Flames untapping Chandra, Fire of Kaladesh (9 damage), tap Chandra, Fire of Kaladesh again (10 damage), flip Chandra, Fire of Kaladesh into Chandra, Roaring Flame and +1 (12 damage)
While Stunning relies more on Traps stopping an opponent's play in the moment, Lockdown sets the field so they don't have the opportunity to play at all

1 Space Marine Devastator 1 Ultramarines Honour Guard 1 Vexilus Praetor 1 Zephyrim 1 Vanguard Suppressor 1 Belisarius Cawl 1 Company Commander 1 Epistolary Librarian 1 Inquisitor Eisenhorn 1 Neyam Shai Murad 1 The Golden Throne 1 Sanguinary Priest 1 Deny the Witch 1 Primaris Chaplain 1 Entrapment Maneuver 1 Utter End 1 Reconnaissance Mission 5 (13) 1 Marneus Calgar 1 Celestine, the Living Saint 1 Triumph of Saint Katherine 1 Sister of Silence 1 Primaris Eliminator 1 Birth of the Imperium 1 The Flesh Is Weak 1 Sister Repentia 1 Knight Paladin 1 Redemptor Dreadnought 1 Grey Knight Paragon 1 Thunderwolf Cavalry 1 Fell the Mighty 7 (4) 1 Exterminatus 1 Reaver Titan 1 Deploy to the Front 1 Hour of Reckoning Common (30) 1 Mind Stone 1 Arcane Signet 1 Commander's Sphere 1 Command Tower 1 Dismal Backwater 1 Evolving Wilds 1 Path of Ancestry 1 Scoured Barrens 1 Terramorphic Expanse 1 Tranquil Cove 5 Island 7 Swamp 8 Plains Uncommon (19) 1 And They Shall Know No Fear 1 Grey Knight Paragon 1 Space Marine Scout 1 Thunderwolf Cavalry 1 Sicarian Infiltrator 1 Sanguinary Priest 1 Deny the Witch 1 Primaris Chaplain 1 Swords to Plowshares 1 Reconnaissance Mission 1 Mortify 1 Skullclamp 1 Sol Ring 1 Talisman of Dominance 1 Talisman of Hierarchy 1 Talisman of Progress 1 Arcane Sanctum 1 Ash Barrens 1 Memorial to Glory Rare (49) 1 Celestine, the Living Saint 1 Defenders of Humanity 1 For the Emperor

This is a Deck that players will have to buy but is worth it in the end