Secret Lair Drop

Voice of Resurgence

Whenever an opponent casts a spell during your turn and when Voice of Resurgence dies, create a green and white Elemental creature token with "This creature's power and toughness are each equal to the number of creatures you control."

Explorer Anthology 3

Double Masters

Whenever an opponent casts a spell during your turn or when Voice of Resurgence dies, create a green and white Elemental creature token with "This creature's power and toughness are each equal to the number of creatures you control."

Modern Masters 2017

Dragon's Maze

Whenever an opponent casts a spell during your turn or when Voice of Resurgence dies, put a green and white Elemental creature token onto the battlefield with "This creature's power and toughness are each equal to the number of creatures you control."