The set printing of any ind
If you can, dont slam into removal, and wait for her to provide extra value Parallax Wave + Tales End/Borrower/Tishanas Tidebinder is a good way to boardwipe your opponent
The Seriema doesnt make itself indestructible, so give it hexproof as soon as possible
Add a power boost and you're winning the game in any going wide deck like Simic Ramp, Gruul Aggro or Selesnya Tokens
In the end, these issues will probably stay relatively minor, even if a little bit of Magics identity is eroded along the way.
That changed when some showed up for March of the Machine , when the multiplanar Phryrexian horrors were enough to rouse some gods from their somnolence without the structures of worship the pips on permanents would represent