If Stupefy's target becomes invalid before resolution (e.g., due to Hidden Blade), does Stupefy still draw a card?

Ruling: Yes, you still draw a card from Stupefy. You do as much as you can on resolution, so as long as the target was valid when you played the card, you draw even if the target becomes invalid before resolution.

Nuances:

• This works for Stupefy specifically because the target being valid is not a condition for the draw
• Other cards like Hidden Blade cannot draw if their target becomes invalid before resolution (e.g., if the target is moved off the battlefield)