Hey all! I was talking to a local player about this situation, and this ruling came up. I'm reasonably certain I know the answer to this question and I told the player the answer, but when he asked me to justify my answer with CR I was unable to, so I'm wondering if my initial answer was correct, and if so (or if not), how to justify it with CR:

Player A controls Player B's Greenwarden of Murasa. Greenwarden dies. I know Player A controls the trigger even if Player B is the owner of the card, but does Player A have the option to exercise the ability by exiling Greenwarden from Player B's graveyard?

I believe the answer is no, but I can't justify my answer with CR which makes me believe I may be mistaken. Am I?

Thanks!

Yes, Player A can choose to exile the card. There's nothing preventing Player A from exiling the Greenwarden from Player B's graveyard, so Player A can choose to exile the card and return the targeted card, even though the Greenwarden ended up in another player's graveyard.

Nathan Long
Magic Rules NetRep