Standstill [IDW Comics 2012] M13 −X: Search your library for

−X: Search your library for an artifact card with mana value X or less

Set: Zendikar Expeditions Type: Land — Mountain Plains Rarity: Mythic ({T}: Add {R} or {W}

Set: Outlaws of Thunder Junction Commander Type: Enchantment Rarity: Mythic Cost: {5}{U}{U} Whenever an opponent casts their first spell each turn

so this is one of several places where players can get a rare or mythic rare in a single Set Booster

Set: Commander 2019 Type: Creature — Zombie Wizard Rarity: Rare Cost: {4}{B} Whenever you discard a creature card

Standstill [IDW Comics 2012] M13 −X: Search your library forSet: IDW Comics 2012 Type: Enchantment Rarity: Rare Cost: {1}{U} When a player casts a spell, sacrifice Standstill. If you do, each of that player's opponents draws three cards. "You learn a lot in no time when you're about to get your neck snapped." Dack Fayden