Tai-Pwei, Wind-Walker

Flash, flying
When Tai-Pwei enters the battlefield, create a 1/1 white bird creature token with flying and "If it is your turn, Tai-Pwei, Wind-Walker has hexproof."
If it isn't your turn, birds you control have hexproof.
"Aviary mischief is the best kind. Even if you look dumb, no one relevant can see it."