Vesuvan Doppelganger [Collectors' Edition] 146a the slivers have become everything

the slivers have become everything he wanted them to be: mindless instruments of destruction and despair

Whenever an opponent taps a land for mana

Niv-Mizzet

Set: XY: Steam Siege Type: Fairy Rarity: Ultra Rare Retreat cost: Colorless

Vesuvan Doppelganger [Collectors' Edition] 146a the slivers have become everythingSet: Collectors' Edition Type: Creature Shapeshifter Rarity: Rare Cost: {3}{U}{U} You may have Vesuvan Doppelganger enter the battlefield as a copy of any creature on the battlefield, except it doesn't copy that creature's color and it has "At the beginning of your upkeep, you may have this creature become a copy of target creature, except it doesn't copy that creature's color and it has this ability."