At long last - beat the corrupted heart with the Watcher after minting an Expunger that did 400 damage per play (Master Reality for upgrade + Chemical X + miracles from Collect for energy + strength from Shuriken & Wish). Only on A0 because I am a scrub. But that’s finally all the characters for me on A0! I even kind of started enjoying playing with the Watcher. Hard character to love.