The Lost Caverns of Ixalan set looks to enrich the games adventure-seeking and explorer themesespecially those with vampires, pirates, merfolk, and dinosaurs
Wave of Vitriol punishes greedy mana bases and decks that rely on artifacts and enchantments
This is MTG, though, and keyword soup is rarely enough to warrant putting a card on any best-of list
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
Attach Umbral Mantle to any creature that taps to produce 4+ mana and boom: infinite mana
Hes typically run alongside Kyros (OP10-046, Rare) Kyros can bounce a 5-cost to hand, and Zoro can KO a 4-cost