Hero card

Mockingbird, Ace Agent

Legendary Creature - Human Spy Hero

PayoffThe more of what it needs is on the battlefield, the stronger it gets: the deck has to feed it a lot

Needs: Counter +1/+1

Gives: Counter +1/+1, Hero / Villain, Attack Triggers

Not in winning lists yet: read from the card text and the graph

Build a deck with Mockingbird, Ace Agent as the hero

Makes it work

Colleen Wing, Street Samurai · Brightfield Mustang · Sunstar Lightsmith · Agent Maria Hill · Case of the Pilfered Proof · Serra Redeemer · Vengeful Townsfolk · Bulwark Ox

Benefits from it

Luxknight Breacher · Valkyrie's Call · Tomik, Orzhov Lawmage · Captain America, Wings of Freedom · Starport Security · Dockworker Drone

Use instead if you don't have it

Luxknight Breacher · Caradora, Heart of Alacria · Yoshimaru, Beloved Companion · Loxodon Battle Priest · Graft Surgeon · Tidus, Blitzball Star

Cards in the meta that answer it

Burst Lightning (Izzet Elemental) · Countersculpt (Azorius Control) · Get Lost (Azorius Control) · Jeskai Revelation (4-Color Control)