Surprise Box of Doom

From 2speccers2tools wiki

As the box cell was displaced from the role of top unicellular predator from things such as the Bruhs or the Goldys, they had to innovate old strategies to keep up. The last remaining populations of the Box Cell evolved into the Surprise Box of Doom. The flaps present in their ancestors open up to reveal large spikes that spring out to impale unfortunate prey before the victim is quickly pulled into the cell to be digested. These spikes are laced with digestive enzymes to help begin to process. Surprise Boxes of Doom have to reproduce quickly with mitosis, as they are no longer the top predators their ancestors were and are prey themselves to things such as Goldys.