Magnetic lift-off lid for secure, tool-free access
Sun-Blessed Peak, Kyoshi Village, and Serpent's Pass are helpful in fixing mana, then provide that umph of a card when you to draw a second card, or need a late card
Faithless Looting and Desperate Ravings not only make you discard more cards that could potentially have flashback, but they themselves have flashback to be played again to fill your graveyard with flashback cards further
Turn 4 (8 Don): , 7-cost Silvers Rayleigh , or Edward Newgate
In Unstable, the basic lands the most common cards in the game received a borderless treatment, and are very different from anything done before
Stoneforged, another Best Designer winner, is also someone I suspect practices a lot