Hero card

Sidequest: Play Blitzball

Enchantment

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

Needs: Valiant

Gives: Enchantment

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

Build a deck with Sidequest: Play Blitzball as the hero

Makes it work

Nettle Guard · Veteran Guardmouse · Whiskerquill Scribe · Emberheart Challenger · Whiskervale Forerunner · Seedglaive Mentor · Mouse Trapper · Flowerfoot Swordmaster

Benefits from it

Redtooth Vanguard · Elvish Archivist · Ethereal Armor · Gremlin Tamer · Stalked Researcher · Optimistic Scavenger · Unwilling Vessel · Erratic Apparition

Use instead if you don't have it

Count on Luck · Pain for All · The Rollercrusher Ride · Outpace Oblivion · Way of the Warlord · Leyline of Resonance

Cards in the meta that answer it

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