Brainstorm in a teacup.
U
Instant
Draw two cards, then put one card from your hand
On top of your library.

Porte'nt
U
Sorcery
Look at the top three cards of your library, then put them back in any order. You may shuffle your library.
Draw a card at the beginning of the next turns upkeep.

I honestly think preordain is probably fine, it's not like storm is putting up results. Might help GDS a bit but that's not horrible either. Green suns and splinter are well overdue.