North Star [Legends] Urza's Power-Plant change Halfdane's base power and

change Halfdane's base power and toughness to the power and toughness of target creature other than Halfdane until the end of your next upkeep

Set: Kaladesh Inventions Type: Artifact Rarity: Mythic Cost: {3} Whenever a nonartifact permanent enters the battlefield under your control

{T}: Add {W}

Each player loses 1 life for each attacking creature they control if {B} was spent to cast this spell

Then shuffle that player's library

North Star [Legends] Urza's Power-Plant change Halfdane's base power andSet: Legends Type: Artifact Rarity: Rare Cost: {4} {4}, {T}: For one spell this turn, you may spend mana as though it were mana of any type to pay that spell's mana cost. (Additional costs are still paid normally.)