Rhystic Study Why allow your opponents to cast spells unfettered when you can force them into Commanders original villainous choice: Do you pay the 1, or feed your opponent the win via card advantage
Annoying for sure but really quite a long way off a True Name Nemesis
You ignore those targeting requirements if those spells aren't bargained, and you can't bargain those spells unless you can choose the appropriate targets
All of the Merlin cards give an ability when returned to hand, like the Merlin Crab which gives another character +3 strength when challenging, when they are played, and when they leave play (which can be in the same turn for a super boost), and Madam Min returns cards to hand when played
Then, we can easily turn 004-174 into a cycle engine through adding a few more Songs into the deck, which we have plenty of if we played the game in the past