Sathrovarr is a 9 Mana Cost Legendary Neutral Minion Demon card from the Descent of Dragons set!
Battlecry: Choose a friendly minion. Add a copy of it to your hand, deck and battlefield.
Flavor TextJust wait until you also find a copy in your pocket. And your desk! And your FRIDGE!!
Sathrovarr Additional Information
Golden version of Sathrovarr is awarded to the owners of BlizzCon 2019 Ticket. Regular version will be given out for free to everyone. (Source)