His only notable weak point is a paltry 1 strength that looks unimpressive on a card that costs 6 ink to play, but as a character intended for questing first and foremost, the 6 willpower provides a strong enough defense to make up for it
Some include a physical or vocal component, like Blacker Lotus or the Gotcha! mechanic on Touch and Go, some have rules that specifically reference flavor text or artists, like Carnivorous Death-Parrot and Drawn Together, and some require interacting with people or objects outside the game (Ashnod's Coupon being my favorite)
In fact, lower rarity cards dont even cost anything to trade
To truly succeed, it needs a professional execution
If you have enough minions on board, just letting them die could win the game without you even attacking anyone
The product listing states how many cards they want to buy for that particular item