If I use Hidden Blade to kill my own unit in response to my opponent's Hidden Blade targeting that same unit, do I draw 2 cards from both Hidden Blades?

Question

Accepted Answer

Ruling: No, you only draw 2 cards from the Hidden Blade that successfully kills the unit. When you kill your own unit first, the opponent's Hidden Blade loses its valid target and cannot determine the controller of the unit (since it no longer exists at the battlefield), so its draw effect does not trigger.

Sequence:
- You respond to opponent's Hidden Blade by flipping your own Hidden Blade to kill your unit
- Your Hidden Blade resolves first, kills the unit, and you draw 2 cards
- Opponent's Hidden Blade tries to resolve but the target unit is no longer at the battlefield
- Opponent's Hidden Blade cannot determine "its controller" because the unit doesn't exist anymore
- No additional cards are drawn from opponent's Hidden Blade

Nuances:
- If the unit is moved away from the battlefield (e.g., via Retreat or Flash), Hidden Blade also fails to draw cards because the target is no longer valid
- Exception: If the unit is saved by Hourglass, you still draw 2 cards because the unit was still "a unit at a battlefield" at the time Hidden Blade resolved, even though the kill was replaced