Due to control decks' tendencies to rely on instants, their end step is a weak spot
The idea being that you would gain the 20 life and then give it to your opponent, so when they couldnt pay they upkeep, they would lose 20 life and essentially the game
At Magic Madhouse, we stock a fantastic range of single Pokmon cards for you to discover

Rarity: R Cost: 2BB Card Type: Enchantment Artist: Adam Rex Name: Leyline of the Void Finish: Regular Card Number: 0044 Set Name: Mystery Booster 2 Related Products Leyline of the Void Guildpact Near Mint, English 4 In Stock Near Mint, English 4 In Stock Near Mint, English 4 In Stock Leyline of the Void Wilds of Eldraine + Enchanting Tales Near Mint, English 1 In Stock Near Mint, English 1 In Stock Near Mint, English 1 In Stock Leyline of the Void Magic 2011 Near Mint, English 8 In Stock Near Mint, English 8 In Stock Near Mint, English 8 In Stock Leyline of the Void Duskmourn: House of Horror Light Play, English 13 In Stock Light Play, English 13 In Stock Light Play, English 13 In Stock Underworld Breach - Future Frame Mystery Booster 2 Near Mint, English 1 In Stock Near Mint, English 1 In Stock Near Mint, English 1 In Stock Worst Fears - White Border Mystery Booster 2 Light Play, English 3 In Stock Light Play, English 3 In Stock Light Play, English 3 In Stock Lifetap - Future Frame Mystery Booster 2 Near Mint, English 5 In Stock Near Mint, English 5 In Stock Near Mint, English 5 In Stock Iona, Shield of Emeria - White Border Mystery Booster 2 Near Mint, English 7 In Stock Near Mint, English 7 In Stock Near Mint, English 7 In Stock

Its a strategy that continues to this day, and it has seen several iterations over the decades
Second, delirium works best in a set with access to more card types