If I play Stupefy on an enemy unit and my opponent responds with Retreat, do I still draw a card even though Stupefy lost track of the unit?

Ruling: Yes, you still draw 1 card when Stupefy resolves even if the target unit is no longer there. The draw effect is not conditional on the target still being present.

Nuances:

• Retreat sends the unit back to hand, not to base
• The unit would receive the -1 effect while in hand (not relevant to base)