"Blessed are the Foolish" is the tenth episode of Durarara!!x2 Ten and the fiftieth episode overall of the Durarara!! anime.
Various people begin making moves concerning the Dollars. Learning of Mikado's current situation, Masaomi resurrects the Yellow Scarves and enlists the aid of Kadota et al to destroy the Dollars. And Aoba, who's working side by side with Mikado, is reunited with his older brother… Meanwhile, the incident triggered by Heaven's Slave's dealings takes an even more complicated turn thanks to Yodogiri's intervention.
adapted from what manga or LN chapter?
references to previous episodes?
In order of appearance (not including OP)
Aoba: "I wish he'd get run over..."