If a player conquers Zaun Warrens and uses its 'when you conquer' effect to discard Mega Death Rocket, can they retrieve Mega Death Rocket from trash with its own 'when you conquer' ability?

Ruling: No, you cannot retrieve Mega Death Rocket with its own 'when you conquer' ability in this scenario.

Sequence:

• You conquer the battlefield and gain the point
• The 'when you conquer' trigger window opens
• At this point, Mega Death Rocket is not yet in the trash (it will be discarded as part of resolving Zaun Warrens' effect)
• Since Mega Death Rocket is not in the trash when the 'when you conquer' trigger window is active, it cannot be retrieved

Nuances:

• The conquer point is gained before the discard effect resolves
• Cards must already be in the trash when the 'when you conquer' trigger window opens to be eligible for retrieval effects