I lost because I clicked too fast. I'll admit it; that being said, in a dedicated graveyard recursion strategy, one would presume the default graveyard to select from would be your own. However, after entombing Mikey and Raph (Timeless meta that likely also needs addressed by restricting Entomb and Mystical Tutor), I reanimated their Juggernaut Peddler that I dazed.

I wanted to just get it over with and finish the game with the most consistent combo in the game, but since I fat fingered their graveyard (which displays first, mind you), I shame conceded.

I would like to suggest that the default graveyard to select from should be your own graveyard, if presented with the choice. It would also be nice to have an alert similar to when you target your own permanents with spells or abilities, e.g. "Are you sure you want to target this card in your opponent's graveyard? Yes/No"