Bolas's Citadel (Promo Pack) [War of the Spark Promos] XY179 ) Whenever Megatron attacks

) Whenever Megatron attacks

Set: Diamond & Pearl: Legends Awakened Type: Psychic Rarity: Rare Retreat cost: Colorless

If you activate this effect

choose up to 1 "Human" or "Dragon" character from among them

Bolas's Citadel (Promo Pack) [War of the Spark Promos] XY179 ) Whenever Megatron attacksSet: War of the Spark Promos 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.