A logical choice would be to keep the game consistent. Remember that other creature that creates "special creatures"? What does it use?
(http://imageplay.net/)
Looks like 
is the right choice to me.
That's because the creature fallen elf|fallen druid is innately full of entropy zzz. A fate chicken has not enough randomness about it. For a chicken to lay a normal fate egg should suffice, but certainly not an elite fate egg.
However, the creature that is being effected, is just being shot with
, not with
, you arent using any
t use the ability. If anything, this means that fate egg should be
and cost
.
We can talk semantics all day and never come to a real conclusion, however, I think the more importnat thing is to forget about the cost, and give feedback about the card itself
