Shark's bs wasn't in his Monster Cards, which summoned and searched each other fairly organically. It was in his Spells/Traps. While Yuma and Kite's mostly did generic damage mitigation, card protection, and Xyz sabotage; Shark's were highly situational from the sort of believable one that negated the lava field IV lured him in (presumably, Shark knew the WDC's arenas had special effects going in) to...this: