-
You can manage & track your card collection and decks once you create an account and login.

I attack with Autobot Cosmos in bot mode and have 2 cards left in my deck, they are both orange. Do I shuffle the deck because there are zero cards, or do I reshuffle on my opponent's turn when I am forced to draw?

You shuffle your deck as soon as there are no cards left.
Source: Wizards of the Coast (2019-05-28)    【Link to Ruling】
Tags: Autobot Cosmos, Recon & Communication