7 cards where the illustration contains “nature-building”

Golgari Guildmage (Ravnica: City of Guilds #248)
Guardian of Vitu-Ghazi (Ravnica: City of Guilds #212)
Overgrown Tomb (Ravnica: City of Guilds #279)
Privileged Position (Ravnica: City of Guilds #251)
Selesnya Sagittars (Ravnica: City of Guilds #229)
Temple Garden (Ravnica: City of Guilds #284)
Vitu-Ghazi, the City-Tree (Ravnica: City of Guilds #285)

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