If I play Emperor's Divine to move units that are in the Battlefield Vilemaw's Lair, can the units move?

Ruling

No, units at Vilemaw's Lair cannot be moved to your base using Emperor's Divide.

Reasoning

• Card Effect: Emperor's Divide is an action that instructs you to move any number of friendly units at a battlefield to their base.
• Vilemaw's Lair Restriction: Vilemaw's Lair contains the restriction: "Units can't move from here to base."
• Interaction: In Riftbound, a "can't" restriction overrides a "can" effect. Because the spell targets the base as the destination, the movement is prohibited by the battlefield's passive ability.

Sequence

1. You play Emperor's Divide targeting your units at Vilemaw's Lair.
2. The spell is placed on the chain.
3. When the spell resolves, you attempt to move the units to your base.
4. Because Vilemaw's Lair prevents this specific movement, the instruction to move the units cannot be followed.
5. Per Rule 356.3.e.6, instructions that cannot be followed are ignored. The spell resolves, but the units remain in Vilemaw's Lair.

Note: This ruling is specific to the destination "base." If a card effect were to move units from Vilemaw's Lair to a different battlefield, the movement would be legal, as Vilemaw's Lair only restricts movement to the base.

Note: I could not fully verify this ruling against the retrieved rules.