Chaoslace [Beta Edition] Elemental Shaman Set: Black & White: Dark

Set: Black & White: Dark Explorers Type: Darkness Rarity: Promo Retreat cost: Colorless

If you search your library this way

Set: Innistrad: Midnight Hunt Type: Land Rarity: Rare Haunted Ridge enters the battlefield tapped unless you control two or more other lands

The Arbiter is a conduit of justice

Set: The Lost Caverns of Ixalan Special Guests Type: Creature — Merfolk Rarity: Rare Cost: {U}{U} Other Merfolk get +1/+1 and have islandwalk

Chaoslace [Beta Edition] Elemental Shaman Set: Black & White: DarkSet: Beta Edition Type: Instant Rarity: Rare Cost: {R} Target spell or permanent becomes red. (Its mana symbols remain unchanged.)