Opposition Agent A bit of a controversial one as we kick things off, but I do think Opposition Agent is underplayed
At the beginning of each end step, if a card left your graveyard this turn, Gau deals damage equal to its power to each opponent
While the cards do seem to accomplish this task quite well, the launch date of the Secret Lair drop itself is of particular interest here
You can exert her to exert an opposing character and if there are any other characters of the same name they exert as well
My inclusions here aren't groundbreaking, to say the least, but I think they will help with consistency
Reflector Mage Reflector Mage was quite the problem child when Collected Company was still in Standard, but its still a strong bounce card