The one copy of Crippling Fear is to help against go-wide aggro decks like Mono-White and Goblins, which can get off to some really explosive starts and be too fast to control with targeted removal, especially if they are on the play
your HP drops to 10 and you get 500 attack power
Many of those come from Universes Beyond releases like the Fallout Commander decks or Secret Lair drops like Jurassic World
Milling eight cards might not seem huge at first, but against artifact-heavy decks, its pure valueyou arent just filling their graveyard, youre shopping from it
It plays in a similar space to Tarkir: Dragonstorm sleeper Tersa Lightshatter, so its success in these decks makes perfect sense
Shortly afterwards, they're followed by Joey and Duke