In a world before Vivien Reid, a planeswalker like Freyalise, Llanowars Fury who simply had Naturalize as one of its abilities was a strong reason to include it
Equipment recursion is super useful, but so is the shield counter
So it might stop a lot of people that love Magic the Gathering from playing Magic the Gathering arena at first, but the game really could open the competitive side for a new player that was only familiar to Hearthstone or Gwent right now
Honorable Mentions: Storm, Squad, Replicate A handful of mechanics function similarly to cards on this list, including storm (Tendrils of Agony), squad (Securitron Squadron), and replicate (Shattering Spree), but they have a distinct mechanical identity since they can only copy themselves, not other spells
9 Goofy - Musketeer The Goofy - Musketeer card is part of the Amber ink set and is classified as a Dreamborn Hero