For 1

+ 1 card + 2 turns you get:
4

2 extra cards
Precognition is 1

+ 1 card + 0 turns for 1 extra card
2 precogs packed into one card is probably worth 2-3

. Gaining 4 extra

should be around 4

I'd say. 2 turn delay means a -1 to -2 to cost.
I'm going to say a cost of 6

seems right.