Bolas's Citadel (White Border) [Mystery Booster 2] Blue;Black choose an opponent to also

choose an opponent to also copy it

Set: Secret Lair Drop Series Type: Creature — Kor Cleric Rarity: Rare Cost: {W} {T}: Another target creature you control gains protection from colorless or from the color of your choice until end of turn

create a 1/1 black Slug creature token

When one or more cards are milled this way

Whenever Overlord of the Mistmoors enters or attacks

Bolas's Citadel (White Border) [Mystery Booster 2] Blue;Black choose an opponent to alsoSet: Mystery Booster 2 Type: Legendary Artifact Rarity: Rare Cost: {3}{B}{B}{B} You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.