Originally Posted by
square_two
IMO there's not enough need to justify it. There is a real risk in having it stuck in hand, and I found extremely few cases where I wanted to tutor it with Rector.
Game 1 most decks just don't have the capability to remove a high cmc enchantment. Against Elves w/ Rec Sage you are most likely getting out Splendor first which prevents that, even Curse most likely gives you the time to find a Deed and stabilize. Against UW control lists with maindeck Council's Judgment, you either get Dovescape to prevent that, or they have a limited amount of time under Cruel Reality which forces them to exhaust resources while you can continue on uninterrupted. Games 2 and 3, you have Sigarda/fatty backup plan, Eternal Witness, better knowledge of what to Therapy. 4 Therapy 2 Brutality are further tools at disrupting hate.
The first Rector trigger is usually game anyway. Starfield doing nothing for a full turn is a huge knock against it - if you are free for a turn and can get a trigger off, why aren't you getting Cruel, Dove, Sandwurm, whatever? Starfield is further graveyard dependency when I already have seen decks bring in that sort of hate.