Marnie's Grimmsnarl ex: Favorable If you can properly raise Munkidori and use Lesson Studio and Adrena-Brain together to knock out Grimmsnarl ex in one hit with Great Scissors including Weakness, you can gain a significant advantage
Manifest the top card of your library and attach Lightform to it
Fun, fun, fun
Emry, Lurker of the Loch Emry, Lurker of the Loch is an efficient bit of self-mill with recursive potential, but this card requires a high concentration of artifacts, making it one of the narrower options on the list
(Look at the top three cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) Threshold This creature can't be blocked as long as there are seven or more cards in your graveyard
The Eighth Doctor only got a TV film and a later minisode, but he still gets his own MTG card, and it's another powerful one, letting you play a Historic card from your graveyard every turn