Blue Mana Battery [Fourth Edition] Goblin Artificer Set: Urza's Saga Type: Instant

Set: Urza's Saga Type: Instant Rarity: Common Cost: {B} Add {B}{B}{B}

players can't cast instant spells or activate abilities that aren't mana abilities

Set: Kaladesh Type: Land Rarity: Common Woodland Stream enters the battlefield tapped

every vine a swift steed

Its controller reveals cards from the top of their library until they reveal a land card

Blue Mana Battery [Fourth Edition] Goblin Artificer Set: Urza's Saga Type: InstantSet: Fourth Edition Type: Artifact Rarity: Rare Cost: {4} {2}, {T}: Put a charge counter on Blue Mana Battery. {T}, Remove any number of charge counters from Blue Mana Battery: Add {U}, then add an additional {U} for each charge counter removed this way.