Can you play 3 Hex Tech Ray cards on the same attacking unit in 3 different action windows during a showdown if the opponent has no runes to react?

Ruling: Yes, you can play 3 Hex Tech Ray cards on the same attacking unit in 3 different action windows during a showdown, even if your opponent has no runes to react.

Sequence:

• When each Hex Tech Ray action resolves, focus is passed around again starting with your opponent gaining focus
• Until both you and your opponent pass focus, the showdown won't resolve
• This allows multiple actions to be played in separate action windows before the showdown resolves