Hero card

Leyline of Transformation

Enchantment

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

Needs: Changeling

Gives: Enchantment

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

Build a deck with Leyline of Transformation as the hero

Makes it work

Flock Impostor · Personify · Omni-Changeling · Chitinous Graspling · Crib Swap · Mischievous Sneakling · Chomping Changeling

Benefits from it

Entity Tracker · Erratic Apparition · Gremlin Tamer · Victor, Valgavoth's Seneschal · Stalked Researcher · Fear of Infinity · Unwilling Vessel · Scrabbling Skullcrab

Use instead if you don't have it

Double Down · Plan for All Outcomes · Tractor Beam · Kitnap · Leyline of the Guildpact · Roll-Roll-Roll-Roll

Cards in the meta that answer it

Countersculpt (Azorius Control) · Get Lost (Azorius Control) · Inevitable Defeat (4-Color Control) · No More Lies (Azorius Control)