Black Market Connections is the headliner, a premium engine that each turn trades life for Treasure, cards, or a 3/2 changeling Shapeshifter that counts as a Villain, and it slots perfectly into a deck built around paying small costs for big advantage
Shiko and Narset, Unified have a solid statline and keyword abilities
That you might be able to do that twice in a turn only makes it all the better
Modulars interaction with -1/-1 counters is tricky
Everything that is specified by the effect creating the original token or tokens will also be true about the additional token or tokens created by Elspeth's replacement effect
Players had to win a lottery just to enter the Extra Battle Days, and their score was scrutinized on everything from wins, to ratio of prize cards won to lost, to the outcome of a game of rock-paper-scissors