When using the Shift 5 ability, which allows the six-cost card to be played one turn early if a cheaper Merlin can be commandeered for the cause, Merlin gets to make use of another feature called Overdeveloped Brain
Preference in this case can turn into votes or best card designs
Chapter II protects you from early aggression, and Chapter III should draw you at least two cards and potentially more (say, an opponent is playing mana creatures)
Cards that make your opponent exile a card from their hand, like Skullcap Snail, wont trigger discard payoffs like Waste Not that care about your opponents discarding cards
Funkos, Baseball, McFarlane, Lorcana, Magic The Gathering, and Pokmon