This mechanic groups five creature types - Assassins, Mercenaries, Pirates, Rogues, and Warlocks - together, with cards that will refer to Outlaws in order to refer to multiple creature types at once or to check and affect those creature types
Here's a brief overview explaining all the elements of each of the Pokemon cards and how they work: I have used the official Pokmon 3D models from Pokmon X and Y and Pokmon Let's Go Pikachu, which can be downloaded here: I have painstakingly downloaded the first 151 Kanto Pokmon 3D models, posed them and designed their unique special attacks for every single Pokmon card
The other option is to focus on what people liked about Standard, what it did well, who it served, and figure out what would have to happen to create organic interest in the format
Knight of the Reliquary tutors up those shock lands for you like nobody's business, all while getting bigger with each successful fetch
Future Flash is the cleaner comparison if you want a different chase structure or sealed price band