It isn't cast, so any abilities that apply "when you cast [this spell]" won't trigger
All in all, its a solid green card with a late-game bonus, but it probably wont keep the price unless someone finds a good way to crack it
The zero ability casually gives you three colorless mana - Combine this with the second part of the static ability, and any cheap, colorless spell (Expedition Map) is a removal spell
Marwyn, meanwhile, is a bog-standard card when elves matter, but thats because she gets huge and makes obscene amounts of mana
Other Budget Upgrades To Consider There are still plenty of basic lands that could be upgraded without losing much tempo
However, if the controller of one of those abilities wins the flip, nothing will happen since the object that ability refers to is no longer on the battlefield