Defender (This creature can't attack.)
When this creature enters, create a 1/1 white Bird creature token with
flying (This creature can't be blocked except by creatures with flying or reach.) for each creature with
defender (This creature can't attack.) you control.
Whenever another creature you control with
defender (This creature can't attack.) enters, create a 1/1 white Bird creature token with
flying (This creature can't be blocked except by creatures with flying or reach.).