For the final immunity challenge, the four players competed in the notorious ball drop timing device, Simmotion, that first appeared during Season 18 in Tocantins. Kyle was excited to play the classic challenge, but Kamilla was keenly aware of the difficulty of it and so she agreed to believe that it's equally scary "for everyone here," not just her. In the challenge, Eva was the first to bow out after adding her third ball to the device. Kamilla was next to drop with the fourth ball added. Joe dropped next, also at the fourth ball, leaving Kyle standing alone as the final immunity challenge winner and giving him the power to decide who sits next to him in the final three and which two will need to make fire to earn their spot.

Even before his individual chats with the others, Kyle had already decided he'd be taking Joe with him to the end in order to "make good on a promise" he made Joe and to prevent him from notching another victory before the final pitches to the jury — he wanted to keep the momentum on his own side. Eva and Kamilla were both told they'd be making fire and so they used the afternoon to practice, understanding that it was their opportunity to show the jury a new jewel in their crown. When it became clear that Eva was struggling to overcome her frustration during practice, both Kyle and Joe contemplated stepping in to her position instead, but she insisted that it was something she had to do.

At the challenge site, Eva was thrown off when she realized that the tools they'd have to make fire differed from the coconut and husks she was using in practice. Still, she pushed through and competed against Kamilla as determined by Kyle. Eva was first to get a flame in her hessian and proceeded to build up a fire using the sticks before Kamilla could turn a spark into a flame. At one point Eva had a scare when her large flame dampened down to a small fire, but she was able to build it back up and won the challenge with Kamilla never producing a lasting a flame at all.

Star was interested in hearing about the "undercover moves" the finalists made to get a glimpse at the aspect of their games that were not obvious. The jury was impressed when Eva revealed she earned the Safety Without Power advantage under the cover of night and that she never used it, but she and Kyle both blew their minds more by admitting to their secrets as a Ph.D. student and a lawyer, respectively.