Mono-Green wants to flood the board with Mossborn Hydra and Mightform Harmonizer and go wide with landfall triggers. Their deck has no artifacts and no flyers in the main, so Glorious Decay has almost nothing to do here and stays in the sideboard. Guerrilla Gorilla is the better answer: it sacrifices to destroy a noncreature enchantment like Sapling Nursery or Earthbender Ascension, and it is a 2/2 reach body in the meantime. Torch the Tower is cheap removal for Llanowar Elves, Sazh's Chocobo, and an early Mossborn Hydra before landfall doubles it, and bargained it deals 3 and kills Keen-Eyed Curator. It does not kill Icetill Explorer, a 2/4. Callous Inspector (1/1) and Umbral Collar Zealot (3/2) are small bodies that don't trade profitably with their growing creatures, so trim them for more impactful cards. Keep the full removal suite, including Deadly Precision, since they have real threats to answer.