19 cards where the colors is BG and the set is “grn”

Assassin's Trophy (Guilds of Ravnica #152)
Attendant of Vraska (Guilds of Ravnica #271)
Charnel Troll (Guilds of Ravnica #160)
Erstwhile Trooper (Guilds of Ravnica #169)
Find // Finality (Guilds of Ravnica #225)
Glowspore Shaman (Guilds of Ravnica #173)
Golgari Findbroker (Guilds of Ravnica #175)
Izoni, Thousand-Eyed (Guilds of Ravnica #180)
Molderhulk (Guilds of Ravnica #190)
Ochran Assassin (Guilds of Ravnica #194)
Pitiless Gorgon (Guilds of Ravnica #218)
Rhizome Lurcher (Guilds of Ravnica #196)
Status // Statue (Guilds of Ravnica #230)
Swarm Guildmage (Guilds of Ravnica #201)
Undercity Uprising (Guilds of Ravnica #210)
Underrealm Lich (Guilds of Ravnica #211)
Vraska, Golgari Queen (Guilds of Ravnica #213)
Vraska, Regal Gorgon (Guilds of Ravnica #269)
Vraska's Stoneglare (Guilds of Ravnica #272)

The message was clear to Sorin—time to search for something else.