Volibear, Imposing
"When an opponent moves to a battlefield" is currently treated as if it were "whenever one or more enemy units move to a battlefield."
- If you control Volibear at Battlefield A and Charm your opponent's Stalwart Poro onto Battlefield B, you will draw 1 card. - If you control Volibear at Battlefield A, and an opponent moves two Stalwart Poros into a showdown at Battlefield B, you will draw 1 card.