It was only available for a very limited time and in very limited quantity
Trading with friends should make it easier to put a deck together by enlisting your fellow trainers, and it seems likely that we get a ranked mode in the future, which could offer better rewards than just XP points and therefore more incentive to battle
Skull Dragon Baby Dragon Barox Barrel Dragon Basic Insect Battle Ox Battle Steer Battle Warrior Beaver Warrior Bickuribox Big Insect Black Illusion Ritual Black Luster Ritual Black Luster Soldier Blackland Fire Dragon Blast Sphere Blue-Eyes Toon Dragon Blue-Eyes Ultimate Dragon Blue-Eyes White Dragon Book of Secret Arts
Take Infernal Grasp and Sheoldreds Edict, for example
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The Trap Card disadvantage is interesting, makes it so this deck isn't able to run many without running risks, so it could work in a monster mash build (although if the deck wants their hand in the graveyard this isn't even a bad thing, it could possibly even work with Infernity's)