Hero card

Koh, the Face Stealer

Legendary Creature - Shapeshifter Spirit

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

Needs: Big Mana

Gives: ETB, Legendary

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

Build a deck with Koh, the Face Stealer as the hero

Makes it work

Haunted Screen

Use instead if you don't have it

Abyssal Gorestalker · Massacre Wurm · The Masters of Evil · Persuasive Interrogators · Krang & Shredder · Zenos yae Galvus

Cards in the meta that answer it

Countersculpt (Azorius Control) · Get Lost (Azorius Control) · Inevitable Defeat (4-Color Control) · Bitter Triumph (Dimir Aggro)