Equipment Matters / Metalcraft This one is a little less likely, but if the set opts to use artifacts for many of the relics and weapons of the Third Age, then metalcraft or other equipment payoffs are mechanics that could work
There are fully thirteen (13!) squirrel cards in Modern Horizons 2
You get extra card draw, more time to cast spells, more combat, and, most importantly, a long time to build up your strategy before your opponent can knock it all down
A lot of nonsense turns into machine guns, like Retribution of the Ancients activated for 0, Squee's Toy, Distorting Lens, Helm of Chatzuk, and most hilariously of all, the on-theme Bloodthirsty Blade
I doubt Ill have room for this in most of my Commander decks, but in something recursive and red
Commanders like Muldrotha, the Gravetide or Meren of Clan Nel Toth should appreciate this card