If I cast Hidden Blade on my own unit but my opponent reacts with Gust to bounce it to my hand, do I still get the draw from Hidden Blade?

Ruling: No, you do not get the draw. For Hidden Blade to identify the controller of the unit, the unit must be a legal target as Hidden Blade resolves AND be in a zone where Hidden Blade can ascertain its information (on the board or in the trash if Hidden Blade was the effect that moved it there).

Sequence:

• Hidden Blade is cast targeting your unit
• Opponent reacts with Gust, bouncing the unit to your hand
• Hidden Blade resolves, but the unit is no longer a legal target (not on the board or at a battlefield)
• Hidden Blade cannot get information about the unit's controller, so you do not draw

Nuances:

• The unit must be in a zone where Hidden Blade can ascertain its information - either on the board or in the trash if Hidden Blade itself moved it there
• If the unit is bounced to hand, it's not in a valid zone for Hidden Blade to check controller information