Flying

Evasive: Imperfect Cell survives an attack that does not lower it's toughness below 0.

Assimilate {1} (If Imperfect Cell blocks or is blocked and survives, it gains one of the abilties printed on the blocking/blocked cardif you pay {1} mana. If Imperfect Cell already has an ability on the card it cannot be chosen again, instead Cell gets another ability.)

If Imperfect Cell Assimilates three abilties, Exile it, and return it to the battlefield on your next untap step transformed.

Flying, First Strike

Assimilate {2} (If Cell, Flawed Evolution blocks or is blocked and survives, it gains one of the abilties printed on the blocking/blocked cardif you pay {2} mana. If Cell, Flawed Evolution already has an ability on the card it cannot be chosen again, instead Cell gets another ability. Cell keeps all abilities from previous transformations)

If Cell, Flawed Evolution Assimilates four times, Exile it and play Semi-Perfect Cell without paying it's mana cost on your next untap step.