Thats three total copies of the spell: the original one you cast, your copy, and your opponents copy
And dont forget that the tabletop release for Ikoria in most of the world has been delayed to May 20, 2020
Lastly, its worth mentioning that a few non-goblin cards from The Lord of the Rings like Saruman, the White Hand, Corsairs of Umbar, and Uglk of the White Handcan boost both orcs and goblins
If you choose to cast the exiled card, you do so while Bre's last ability is resolving and still on the stack
You can then turn you army of 1/1's into game-ending threats with the help of cards like Cathars' Crusade, Sigil of the Nayan Gods, Overwhelming Stampede, or any other big pump card you've got lying around
It took me a bit to get into a good rhythm, but I ended up with this process: First Id use the import function to import the text from the original version of the card