M-League

The Micro archetype is an archetype which consists of Level 1 monsters. They aim to swarm the field in order to bring out Rank 1 Xyz's like Lion Heart. They are considered to be tiny pieces of an object that is mentioned in the name. In Yu-Gi-Oh! Battling for the Lions, this is used by Richard and because of the small size of those cards, most duelists think that Richard is cheating.