Given how good Thalia is against spell-based decks, Im expecting Spikefield Hazard to start showing up in greater numbers than before, so beware of that when building a deck that wants to play its own X/1 creatures
Pull it out of the garbage and dust it off with Daretti, Scrap Savant or Goblin Welder
Akroma's Will Ancient Copper Dragon Atraxa, Grand Unifier Gix, Yawgmoth Praetor Kinnan, Bonder Prodigy Najeela, the Blade-Blossom Nyxbloom Ancient Purphoros, God of the Forge Ragavan, Nimble Pilferer Ranger-Captain of Eos Rhystic Study Thrasios, Triton Hero Urza, Lord High Artificer Vial Smasher the Fierce Yawgmoth, Thran Physician
There are many new mechanics present, but more importantly, returning features