do you sleeve cards before putting in binder Trading Card Pages, PANDRI 100 Pack 9 Pocket Trading Card Storage Album Pages 11 Holes Fit 3 Ring : Office Products 4 Pocket Top Loader Sleeves,

They can power up your monsters, weaken or destroy enemy monsters, make it easier to Xyz Summon, and a whole lot more

The characters in the story allude to this, but the name says otherwise

3 Yuubi the Souten Brawler 3 Soukoku the Souten Kicker 2 Honest 2 King of the Swamp 2 Kaiki the Unity Star 3 Souten Calling 3 Two as One 2 Souten Exorcism 1 Instant Fusion 1 Monster Reborn 1 Reinforcement of the Army 1 Terraforming 1 Harpies Feather Duster 1 Polymerization 1 Fusion Substitute 3 Fusion Deployment 2 Supply Squad 3 Soutens Return 1 Soutens Duty 3 Copy Knight 1 Necro Fusion 3 Kongou, Heavenly General of the Souten 3 Gaia the Souten Brawler 3 Gaiun the Souten Kicker 1 Shura the Combat Star 2 Idaten the Conqueror Star 1 Gilti-Gearfried the Magical Steel Knight 1 First of the Dragons 1 Constellar Pleiades Deck Concept A Souten Deck featuring Copy Knight

Inner sleeves should fit snugly, but too much pressure on card edges and corners leads to wear over time

So for example, Sheou is just House rearranged, and this trend follows the rest of the other dragonmaids