If Hidden Blade targets a unit on a battlefield, but that unit is moved to a base in response, does the unit die and does anyone draw 2 cards?

Ruling: The unit is no longer at the battlefield and cannot be a legal target for Hidden Blade. The unit does not die and no one draws cards.

Nuances:

• The draw effect is a separate instruction, but without a legal target, no controller can be determined to draw the cards