Biggie had instructed housemates to knock down as many bottles as possible within a two-minute time frame.
Phyna has won this week's head of house task.
The Big Brother Naija housemate will now take charge of the house for one week.
Phyna emerged winner after a game of chance.
Biggie had instructed housemates to knock down as many bottles as possible within a two-minute time frame.
After the first round, Adekunle, Daniella, Phyna and Sheggz qualified.
The four housemates were instructed to fill up a cup of water with their mouth.
At the end of the game, Phyna was the first housemate to fill up with the cup.
She is the first former level 2 housemate to win the title.