Assumed 4 Preordain :)

On a side note, I'm going through the mono-U lists and many of them seem to have been using 0 -1/2 Dream Halls. Was that because of the no discard metagame before the TC ban? I can see the argument about Dream Halls vs Burning Wish (mono-U vs UR) but going full cantrip suit and no Dream Halls seems like putting all your eggs in one basket.