If Void Seeker targets an enemy unit on a battlefield, but the opponent uses Flash to move that unit to their base in response, does Void Seeker lose its target?

Ruling: Yes, Void Seeker loses its target and deals no damage because the unit is no longer on a battlefield when the spell resolves, making it an illegal target.

Sequence:

• Void Seeker is played targeting an enemy unit on a battlefield
• Opponent responds with Flash, moving the unit from battlefield to base
• When Void Seeker resolves, the target is now illegal (not on a battlefield)
• The damage portion is ignored, but you still draw your card

Nuances:

• You still draw the card from Void Seeker even though the damage portion fails due to the illegal target