Hero card

Fractured Realm

SpellUsed once: what it does depends on when you cast it

Needs: Changeling, Valiant, Big Mana

Gives: Room

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

Build a deck with Fractured Realm as the hero

Makes it work

Firdoch Core · Whiskerquill Scribe · Whiskervale Forerunner · Veteran Guardmouse · Nettle Guard · Changeling Wayfinder · Personify · Mouse Trapper

Benefits from it

Unwilling Vessel · Infernal Phantom · Scrabbling Skullcrab · Gremlin Tamer · Entity Tracker · Stalked Researcher

Use instead if you don't have it

Multiversal Incursion · Mirror Room · Wanderwine Farewell · Extravagant Replication · Impostor Syndrome

Cards in the meta that answer it

Countersculpt (Azorius Control) · Inevitable Defeat (4-Color Control) · No More Lies (Azorius Control) · We Say Thee Nay! (Dimir Aggro)