They're also four cards that function very similarly and have played key roles in various decks over time
This five drop 5/5 on curve Naya colored dork gets bigger as more Auras are added in size, and that's card disadvantage if you kill it, but not without jumping through some targeted restrictions first, and you can Edict them, but they'll sac another dork, or Damnation the board, but respond with Heroic Intervention or just give it an indestructible Aura
Of course, playing meta will probably help you increase your MTG Arena rank
If the creature Grim Reaper's Sprint would enchant is an illegal target by the time Grim Reaper's Sprint would resolve, the entire spell doesn't resolve
Since it requires a dedicated Grixis manabase, I cant imagine it becoming a multi-deck staple like Karn, Scion of Urza or even Chandra, Torch of Defiance