Later Structure Decks, such as Structure Deck: Master of Pendulum / Master of Pendulum Structure Deck , have more than 1
The Most Dangerous Gamer Somewhat miraculously, for a while, The Most Dangerous Gamer actually saw play within Legacy of all formats
Hydrapple Ex - Debuting in the set as Dipplin's evolution, Hydrapple Ex has a whopping 330 HP, an ability that allows it to heal itself or other Pokemon while ramping up energy, and a powerful attack that can deal incredible damage when combined with Teal Mask Ogerpon Ex from Twilight Masquerade
Sylvan CaryatidSylvan Caryatid can help us ramp into our threats, and both Arcades SabbothArcades Sabboth and Arcades, the StrategistArcades, the Strategist work well if we fill out our deck with support cards that happen to be defenders
choose 1 "Exosister" monster from your Deck, then take 1 other "Exosister" monster from your Deck that is mentioned on that monster, and Special Summon both, but shuffle them into the Deck during the End Phase, also for the rest of this turn after this card resolves, you cannot Special Summon monsters from the Extra Deck, except "Exosister" monsters
A lot of care needs to be taken to design a set with their existence in mind