For example, Esper Sentinel can be dropped on turn one, and as you attach Equipment later you'll be more and more likely to draw cards every turn
Of course, there's every reason for your opponents to refuse, but that's when you turn on the charm
Runner-Up: Goreclaw, Terror of Qal Sisma Artifact The land found by Expedition Map comes into hand, not onto the battlefield, but were not limited to the kind of land were allowed to search for
Limit Break (FINAL FANTASY VII) The world of FINAL FANTASY VII comes alive in the Limit Break deck, a Red-Green-White concoction led by Cloud, Ex-SOLDIER, and Tifa, Martial Artist
There are almost 40 different planeswalkers, many at uncommon, so you get some really powerful cards with a box of boosters
It is four mana, though, so probably best in artifact heavy builds