Mari the Killing Quill
At the beginning of his return, it was sometimes used in his decks (Dragon Ruler, etc.) that had too much summoning rights, but he no longer had the influence he once had, and a year after his return, he was unlimited
For example, creating three Rhystic Study copies makes it almost impossible for your opponents to play the game without feeding you cards, multiple Archangel of Tithes shuts down attackers, and so on
But then, this is a set that sports the three cards below, which are equally, if not more, stunning
Though this deck archetype hasnt been one of the leading decks of the metagame thus far, it has nonetheless made several deep runs in tournaments and clearly does have some level of gameplay viability
We need to do something about these cards