Upgrading can make your deck stronger, better for your preferred playstyle, and of course more fun
These are my main two concerns for the potential problems of white copying
Gallery and List of Omen Cards Bloomvine Regent Cunning Azurescale Dirgur Island Dragon Disruptive Stormbrood Feral Deathgorger Marang River Regent Pearl Lake Warden Purging Stormbrood Riling Dawnbreaker Runescale Stormbrood Sagu Wildling Scavenger Regent Stonehide Ancient Stormshriek Feral Twinmaw Stormbrood Whirlwing Stormbrood Best Omen Cards #7
Scrappy Survivors - Dogmeat, Ever LoyalDogmeat, Ever Loyal This is that other Naya Equipment deck I was talking about
Meanwhile, Teferi, Time Raveler isn't really a finisher, but it is a good way to close down control deckswhich seem to be very popular on Magic Arena at the momentby making them play at sorcery speed, which locks down all of their counterspells and forces our opponent to use their removal at inopportune times
It doesnt even cast the artifact, so you can get a cheap Portal to Phyrexia or Kaldra Compleat without giving your opponents much of a window to respond