Okay so I looked at every character and mech used in Gurren lagann, and I got an idea for a decklist.
It's unfinished, but I decided to have the deck use the spiral and anti-spiral factions together, with the anti-spiral types needing monsters banished until the levels match, and if the anti spiral monsters get destroyed you shuffle the banished cards back into the deck.
(Basically for a level 12 anti spiral type monsters, you need to banish three level four monsters, one level ten and level two, etc.)
As for the question of how both sides will get along in their duel spirit, I'm thinking both sides work together because of the entity that sent Ren to a new world, but will that work?
Anyways I should be able to finish the full decklist by next week, so hope you're excited.
(Also I'm not sure if I got ALL of the images for the cards right, I just chose the one that appeared the most in each search and chose the best one.)
Peace 😁✌️