The interaction between Psychosis Crawler and Jace's Archivist doesn't work, because Psychosis Crawler simply dies when you discard your hand.
Also, I didn't see mention of what is probably the most efficient infinite combo in all of MtG: Time Vault + Voltaic Key. Granted, this is in Vintage, but ... from only two cards, infinite turns on turn two! With decent mana acceleration in your hand (e.g., Mishra's Workshop and a Lotus Petal), you could easily go infinite turn one.
The interaction between Psychosis Crawler and Jace's Archivist doesn't work, because Psychosis Crawler simply dies when you discard your hand.
Also, I didn't see mention of what is probably the most efficient infinite combo in all of MtG: Time Vault + Voltaic Key. Granted, this is in Vintage, but ... from only two cards, infinite turns on turn two! With decent mana acceleration in your hand (e.g., Mishra's Workshop and a Lotus Petal), you could easily go infinite turn one.