Vanessa ObiohaBig Brother introduced another round of game-changing twists on Monday night with the new gameplay called Conspiracy Hour, overhauling the nomination process and leaving 16 housemates facing possible eviction. Housemates entered the Conspiracy Zone one at a time and could invite as many allies as they wished for a one-minute strategy session. With the twists completed, 16 housemates were left on the chopping block. Biggie also announced the return of the performance-based prize system, meaning the ₦100 million grand prize is no longer guaranteed. Housemates not only have to survive evictions, but also ensure strong performances in the weekly tasks to keep the ₦100 million grand prize from shrinking.