Mother of Runes [Mystery Booster] Planar Chaos Scholars say that arbiters exist

Scholars say that arbiters exist on every world

"General *nuisance*

Set: Visions Type: Enchantment Rarity: Rare Cost: {2}{U}{B} If a player would draw a card

"It's filthy work

Set: Alpha Edition Type: Artifact Rarity: Rare Cost: {1} Mana Vault doesn't untap during your untap step

Mother of Runes [Mystery Booster] Planar Chaos Scholars say that arbiters existSet: Mystery Booster Type: Creature Human Cleric Rarity: Uncommon Cost: {W} {T}: Target creature you control gains protection from the color of your choice until end of turn. She will not touch a weapon, yet she is the greatest protector her people have ever known.