The original "Noble Knights" (except "Noble Knight Joan") are based on the Knights of the Round Table of Arthurian legend, or on related concepts from Arthurian legend
Any Monster can become a Deck Leader once its Rank has been promoted at least once, by participating in Duels
The other alien components are labeled in a tray along with their boards, meaning everything is very easy to find in these two trays
Having a release valve for powerful cards in older formats that try to lock you out of the game is extremely useful
Most often this is a creature, but stealing planeswalkers, problematic artifacts, or anything else is really handy
Tepig's signature moves, such as "Flame Charge" and its eventual evolution gaining Fighting-type moves, provide a varied tactical approach for players