23 Jun 2020
If a permanent wasn't put into your hand from the battlefield before your end step begins, Barrin's ability doesn't trigger at all.
23 Jun 2020
Barrin's last ability checks the entire turn, even before Barrin was on the battlefield.
23 Jun 2020
If a token is returned to your hand, it's put there before it ceases to exist.
23 Jun 2020
The permanent that was returned to your hand doesn't have to still be there.
23 Jun 2020
You draw only one card, no matter how many permanents were put into your hand from the battlefield during that turn.