If I use Flash to recall my unit in response to Hidden Blade targeting it, do I draw 2 cards and does my unit survive?

Ruling: You do not draw 2 cards and your unit survives. When your unit is recalled to base before Hidden Blade resolves, it becomes an illegal target, so the game cannot determine the controller of the unit.

Sequence:

• Hidden Blade is played targeting your unit
• Flash is used to recall the unit to base
• When Hidden Blade resolves, the unit is no longer in the battlefield
• Hidden Blade cannot resolve because the target is illegal
• No cards are drawn and the unit remains safe in base

Nuances:

• The unit survives specifically because it is no longer on the battlefield when Hidden Blade tries to resolve