Craft a unique background and story for your game, and then create various types of cards, like character cards, battle cards, and magic cards
Thats not to say 5 mana for a Shrieker is cheap, but if you are trying to play a sped up game in a format with big dumb things and enters tapped lands, having effects that dont care about blockers late in the game is a plus
And since revealing it doesnt get rid of it, you can do so over and over again
If you run low on spare cards in YuGiOh Duel Master, chuck some Gems at the special bundles to get dozens of cards and earn a chance to get secret packs
It comes with all six cards (not a random pick), plus four booster packs of Rise of the Floodborn
At the end of the Battle Phase, if your "Gladiator Beast" monster battled: You can shuffle that monster into the Deck or Extra Deck