Rituals like Dark Ritual help you get to your second spell quickly, Clockspinning supports your suspend cards which are another way to cast spells without paying the mana that turn
Take, as a famous example, Urborg, Tomb of Yawgmoth
Best No Maximum Hand Size Payoffs Infinite hand sizes are more useful as a late-game play
My only complaint about Six is that the returned land must be from those three cards you milled, rather than any of the lands in your graveyard
Id imagine well eventually see some sort of UB Masters-type set, in which case Pre-War Formalwear may make another appearance
Herald's Horn Herald's Horn is yet another rock that only fits in creature-heavy typal decks but, as one of the best typal support cards, it indeed fits like a glove in those