Mafia 48. Club of the Almighty

The clue is "the fall of the twentieth-century wall." This refers to the Berlin Wall. The officially recognized founding date of Berlin is October 28. That was also when Naver was registered.

A bonus for Estrello upon Spir's death: "The antagonist of one of Mother Goose's tales." This refers to Charles Perrault's collection of fairy tales, "Tales of Mother Goose." In the tale "Little Red Riding Hood," the antagonist is the gray wolf. Again, the wolf is in the nickname and signature of Wulfgar.

A bonus for Estrello upon Drakkosha's death: "Four inanimate owls." This refers to the crystal owls, which are awarded to the best participants in the "What? Where? When?" club. Four times, Fyodor Dvinatin won this prize, and he was born on October 28. Yes, again, the date of Naver's registration.