Its a bit slow, but it shines when you need to hit land drops, fix colors, or deplete your deck of lands to maximize exile effects like Wrenn's Resolve and never run into dead cards
Anya seems like she is meant to close out the game quickly after your initial rush gets your opponents to low life totals, but theres some difficult tension there: as you eliminate players, she gets weaker again
Or Cats, or Soldiers, or Warriors, or Spirits or whatever else shares a color identity with White
This adds a two-dimensional ticking clock on your opponents
The only other removal spell Id say is essential in mono green is Song of the Dryads
Everyone's Invited currently has a market value of approximately $300, according to TCGPlayer