Bolas's Citadel [War of the Spark] Goblin Mutant Set: The List Type: Artifact

Set: The List Type: Artifact Creature — Construct Rarity: Rare Cost: {4} Converge — Crystalline Crawler enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it

When Spinnerette

created by an unknown hand to enforce justice

and may want to in response to this ability

Bolas's Citadel [War of the Spark] Goblin Mutant Set: The List Type: ArtifactSet: War of the Spark 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.