When you start an arena game, it doesn't let you customize the options, and I've always played arena without the swift start birds. When starting an arena game, it won't let me change the drop down to include them.
But I recently played a non-arena game and included them. Then, the next time I went to start an arena game, the option to include them was turned on, rather than off. And one of them showed up during the arena game. So apparently, you can change that setting by changing it in your non-arena game challenge, and then switching to arena mode.
But I recently played a non-arena game and included them. Then, the next time I went to start an arena game, the option to include them was turned on, rather than off. And one of them showed up during the arena game. So apparently, you can change that setting by changing it in your non-arena game challenge, and then switching to arena mode.