Restraint
Max cells inserted: 1
Min cell count: 50
Max cell count: 150
Time required: 500 hr
Difficulty: difficult
Cells allowed: phagocyte-flagellocyte
You must keep a low cell count in optimal reproducing conditions for 500 hr and it must not exceed 150 cells. Think tell me what ya think

Edit: made the goal less difficult
Because the max cell was too low.
It's manegable now substrate is done now I'll post it soon.