This includes all of the tutors that either fetch anything but lose a card (Vampiric Tutor, Imperial Seal) or grab one thing but puts it into your hand cheaply (Steelshaper's Gift, Buried Alive, Idyllic Tutor, Sylvan Scrying, etc.)
There are scientific methods, and non-scientific ones, to help the basic MTG player differentiate a real card from the fakes
Locke Cole A saboteur looter is pretty good and going to be a limited staple, but I doubt well see this Locke too much outside of that
If the board gets too scary, cards like Fell the Mighty and Dusk/Dawn serve as one-sided board wipes that destroy massive threats while keeping your army of 2-power creatures perfectly safe
Haste is merely a useful way to make those that arrived punch, but that +1/+1 isn't chump change