Is your Chosen Champion considered a card in the Main Deck?

The Chosen Champion is indeed considered a card in the Main Deck. This means that it follows the same rules and mechanics as other cards in your Main Deck during gameplay. Being classified as part of the Main Deck allows it to interact with the deck-building rules, including limits on card types and synergies with other cards in play. In this way, it contributes to your overall strategy throughout the game.

The other options suggest various misunderstandings about the role of the Chosen Champion. For example, indicating that it is separate would contradict its engagement in the game as part of your strategy. Stating that it only counts during specific turns implies a unique status that doesn't align with the standard card mechanics in the game. Lastly, suggesting it can only be played once per game misrepresents its functionality since it is intrinsically tied to the Main Deck's ongoing play. Each of these misconceptions overlooks the fundamental aspect of how the Chosen Champion is integrated within the overall deck structure and gameplay.