Return target permanent card in an opponent’s graveyard to the battlefield under their control. When that permanent enters, return up to one target permanent card with equal or lesser mana value from your graveyard to the battlefield.
Obscura spies rarely stay locked up long enough to make it to trial.
You don't choose a target from your own graveyard until after the permanent card from your opponent's graveyard has entered the battlefield. If that card doesn't enter the battlefield for some reason, you will not be able to target and return a card from your own graveyard.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.