How does Volibear's Imposing ability work? Does it trigger when opponents move units to battlefields?

Ruling: Volibear must be at a battlefield for his ability to trigger. When an opponent moves one or more units with a Standard Move or spell to a different battlefield (not the one Volibear is at), you draw a card.

Sequence:

• Volibear must be positioned at a battlefield (not in base)
• Opponent performs a Standard Move or uses a spell to move their unit(s)
• The unit(s) must move to a battlefield where Volibear is not present
• You draw one card (regardless of how many units moved simultaneously)

Nuances:

• Conquering a battlefield does not trigger the ability
• Summoning a unit directly to a battlefield (like Deadbloom) does not trigger it, as this is not a move
• If you move an opponent's unit (e.g., with Charm), this does not trigger the ability - the opponent must be the one performing the move action
• Moving multiple units simultaneously in one move action only draws one card, not multiple