Can you stun a unit in an enemy base?

Ruling: Yes, you can stun units in bases. Whether you can target enemy units specifically depends on the exact wording of the ability or spell.

Sequence:

• If the ability says "Stun an enemy unit" - you can target any enemy unit including those in bases
• If the ability says "Stun an enemy unit at a battlefield" - you cannot target units in bases
• If the ability says "Stun a unit" (without specifying enemy) - you can target any unit including friendly units

Nuances:

• Abilities that say "stun a unit" without specifying enemy can target friendly units
• If an ability says "stun a unit" and only friendly units are on the board, you must stun a friendly unit