Verdance, Thorn of the Rose (ROS013 M Regular)

If there are 8 or more Earth cards in your banished zone, Verdance gets "Whenever you gain during your turn, you may deal 1 arcane damage to any opposing target."
Essence of Earth (You may have Earth cards in your deck.)
Elemental Wizard Hero

Majestic
From the Flesh and Blood TCG set Rosetta