Can you play The Syren during a Showdown to recall a unit?

Ruling: No. The Syren's activated ability cannot be used during a Showdown. Gear abilities can only be activated during an Open State in your Action Phase, not during a Showdown.

Sequence:

• The Syren must be played to your Base during an Open State on your turn (before any Showdown begins)
• The Syren's ability can only be activated during an Open State in your Action Phase
• Once a Showdown has started, you cannot activate Gear abilities

Nuances:

• The Syren's "Move to base" effect is a standard Move, not a Recall, because it uses the keyword "Move"
• As a Move (not a Recall), it can be prevented by effects that restrict movement and will trigger "when a unit moves" abilities
• Gear cards cannot be played from hand during a Showdown - they require an Open State during your Action Phase