If Facebreaker targets a friendly unit and an enemy unit at the same battlefield, but one target is removed before resolution (e.g., by Gust), does the spell still stun the remaining legal target, or does it fail entirely because the targets are no longer at the same battlefield?

Ruling: The spell fails to resolve entirely if either target is removed or moved before resolution. Both targets must remain at the same battlefield for the spell to work.

Nuances:

• There was initial disagreement about whether "do as much as you can" (silver rule) would allow stunning the remaining target
• The group targeting rule does not apply here because the targets satisfy different requirements (one friendly, one enemy)
• The card language is acknowledged as vague, leaving room for interpretation
• The final consensus is based on the "flavor" of the card: two units smashing heads together requires both units to be present at the same location
• This ruling has been submitted for official clarification in the Official Rules Documents (ORD)