Secret Lair x Dungeons & Dragons: Strahds Descent Strefan, Maurer Progenitor (6200 EDHREC decks as commander, 9k more as card, EA $3) Bloodletter of Aclazotz (138k decks, Borderless foil $35) End the Festivities (64k decks, Double Feature foil $7) Voldaren Estate (55k decks, SLD foil $3, Double Feature foil $13) This is one of Wizards favorite Secret Lair setups: One very good card and three pretty mid cards
Shadowmoor also showed off another asset of hybrid, this time in Draft
Thats not always a given for green decks, so I imagine Synchronization will be very good in some shells, though worse on average than Cultivate
It was a late addition to the Ice Age block, replacing the much maligned Homelands set
Theres also colorless options in: Blinkmoth Nexus Crawling Barrens Faceless Haven Inkmoth Nexus Mirrex Mishra's Factory Mishra's Foundry Mobilized District Mutavault Equipment/Auras Whether Sram, Senior Edificer or a more focused aura or equipment commander, plenty of these cards are good includes
One other note: I know that Riches looks a little bit like Blatant Thievery (a Commander staple), but giving your opponent the choice makes it much more similar to Evangelize (a card you've probably never seen before, for very good reason: it's horrible)
