ppl tend to be afraid of removal. I mean, a terror can potentially be a barter in blood en-instant with the croc.
It goes like this:
You have a croc and another non-black/artifact creature.
You play another creature.
I respond by terroring your non-croc.
Croc's ability triggers as soon as the stack clears.
other creature hits the board.
croc dies.
It's just that...that's all.