Serialized cards often have unique artwork or foil treatments Limited print runs with cards being numbered individually out of 500 (varies.) Comparing Serialized to Non-Serialized Cards Theres a definite difference between serialized and non-serialized cards other than a number stamped on the front of the card
1 Tarkir: Dragonstorm Collector Booster containing 15 MTG cards and 1 Traditional Foil double-sided tokenFIGHT DRAGONS WITH DRAGONS Return to Tarkir for an epic battle between dragons and clans
Atarka, World Render Few cards can deliver knockout punches as quickly as Atarka, World Render
In contrast, Faces of the Past is an MTG card that can go in any blue-aligned typal deck
Serialized Sol Ring cards can be found in nonfoil or Double Rainbow Foil
Winter Soldier, Icy Assassin Saffgor: I think this is a new space for Equipment, and allows you to cheat some huge costs, both on Commander Tax & Equip abilities