How does The Zero Drive card work, specifically the 'banish this' mechanic and what it's used for?

Ruling: When a unit equipped with The Zero Drive dies, you banish that unit. You can then pay the cost and banish The Zero Drive equipment itself to return all units that were banished by The Zero Drive's "When an equipped unit dies, banish it" effect.

Sequence:

• Unit equipped with The Zero Drive dies
• That unit gets banished (instead of going to discard)
• Pay the cost and banish The Zero Drive equipment
• All units banished by The Zero Drive's effect return

Nuances:

• Banished units go to a separate zone called the banished zone, not the trash/discard pile