This is because it instantly extracts all the value of those four cards that you would have gotten by drawing them one a time normally
The Horus Heresy is this decks saga card
While most newer players will think of Momentary Blink or Ghostly Flicker when discussing a blink/flicker deck (the terms are interchangeable), many MTG players who have been playing since the 1990s will tell you that these terms have been around as long as Blinking Spirit and Flicker
Hildibrand Manderville may remind you of one quite competitive card from Wilds of Eldraine
Drop a Storm Herd, or a Nesting Dovehawk, or even a Wedding Announcement to build up a mass of tokens, and Arabella is easily one of the scariest commanders weve seen in a good long while
Yet even when we can't outmaneuver our foe in such a way, Deadly Dispute is an amazing source of card advantage for any deck that has an abundance of either cheap creatures or artifact tokens (like Treasures), and if timed correctly can even help fix your mana