MAGIC: THE GATHERING
Counter target enchantment, instant, or sorcery spell. Its controller puts a 2/2 blue Bird creature token with flying onto the battlefield.
Giving your opponent a 2/2 flyer is rough, but it's not so bad when the spell you're countering is game-ending. This happens all the time in Commander and most of the time, a 2/2 flyer is the least of your worries.