Can you discard Super Mega Death Rocket from your hand when you conquer to immediately return it back to your hand using its own ability?

Ruling: No, Super Mega Death Rocket must already be in the trash when you conquer for its ability to activate. The card's ability self-identifies as being in trash, so it cannot be discarded from hand to trigger itself.

Nuances:

• Even if you discard Super Mega Death Rocket as part of another "when you conquer" effect (like Zaun Warrens), you cannot return it with its own ability because the conquering already happened and triggered everything before the discard resolved. The rocket was not in trash at the moment of conquest.