Walking Ballista [Secret Lair Drop Series] Island if that spell's mana cost

if that spell's mana cost is {3}{U}{U}

or enchanted by anything black

Set: Commander Anthology Type: Enchantment Rarity: Uncommon Cost: {2}{R}{R} At the beginning of the end step

Set: Ravnica Allegiance Prerelease Promos Type: Creature — Mutant Rarity: Rare Cost: {G}{U} Activated abilities of creatures you control cost {2} less to activate

untap Forsaken City

Walking Ballista [Secret Lair Drop Series] Island if that spell's mana costSet: Secret Lair Drop Series Type: Artifact Creature Construct Rarity: Rare Cost: {X}{X} Walking Ballista enters the battlefield with X +1 +1 counters on it. {4}: Put a +1 +1 counter on Walking Ballista. Remove a +1 +1 counter from Walking Ballista: It deals 1 damage to any target.