Does 'Chosen Champion' refer only to the specific card separated at the start of the game, or does it refer to all copies of that card played throughout the game?

Ruling: 'Chosen Champion' refers to all cards with the same name as your chosen champion, not just the specific card separated at the start of the game.

Nuances:

• This applies regardless of whether the card came from your champion zone or from other zones (like your deck)