Logo text [This story contains spoilers from Survivor 50: In the Hands of the Fans ‘ new episode, “The Blood Moon.”] It’s around midnight on Mana, the Fijian island where Survivor films and sets up its basecamp for a few months out of every year, and Jeff Probst has emerged from the darkness wearing flip flops. The perennial host has changed his footwear just after running the equivalent of a reality-TV marathon: Emceeing three tribal councils in a row for the first time in Survivor ’s 50-season history, going for several hours without a break — or a script. Yet he appears more energized than ever. Emotional, too. He rattles off thoughts on the three contestants who were just voted off, having made the merge — that key midpoint in the iconic competition series where divided tribes come together to battle out the endgame — but not the jury, where they’d be able to vote for the winner.  “Kamilla was shocked,” Probst says. “ Shocked .” “It was hard to lose Genevieve.” “How lucky that we got to Colby last.…