Can you play Stare Down if there are no enemy units at the chosen battlefield?

Ruling: Yes, you can play Stare Down even if there are no enemy units at the chosen battlefield. The card only requires you to choose a friendly unit and a battlefield as targets. The instruction to move enemy units operates on whatever is present at resolution; if no enemy units are there, that part of the effect does nothing, but the rest of the card (including gaining 1 XP) still resolves.

Nuances:

• A spell can be played as long as its targeting requirements are met, even if some instructions will have no effect at resolution.
• The presence of enemy units is not a requirement to play the card, only to have units affected by the movement portion of the effect.