better. Still a little weird.
I'll take that as a compliment.
The ability should not affect other crows (they should be excluded from the random selection). That will make it interesting with fractal and mitosis. It will not be overpowered because they are so fragile, expensive, and blockable.
Interesting take. I'll add it to the list of things not targeted. Some possible decks:
CC and DrainEarth Mark
6 crows
6 pests (burrowed before playing crows)
6 drain life
1 dusk
1 dagger
10 dark pillars
Shield StealerLife Mark
6 crows
3 mitosis
3 feral bond
3 steal
2 eclipse
1 dusk
1 dagger
5 dark pendula
5 dark pillars
Death Comes KnockingDark Mark
6 crows
6 boneyards
3 bone Walls
2 eclipse
3 steals
10 death pendula
For the last one you'd have to time it so you put out everything at once, otherwise the crows will just end up killing skeletons. Probably there are some other uses you could throw in to things like pestal or death decks, or anything with few creatures.