Breach the Multiverse (Extended Art) [March of the Machine] CRU050 and it becomes a Vampire

and it becomes a Vampire in addition to its other types

Nightmare's power and toughness are each equal to the number of Swamps you control

Set: Innistrad: Crimson Vow Type: Legendary Planeswalker — Sorin Rarity: Mythic Cost: {2}{B}{B} +1: Look at the top card of your library

Set: Theros Type: Legendary Enchantment Creature — God Rarity: Mythic Cost: {3}{B} Indestructible

and preferred to live entirely on creatures that preyed on sentient beings

Breach the Multiverse (Extended Art) [March of the Machine] CRU050 and it becomes a VampireSet: March of the Machine Type: Sorcery Rarity: Rare Cost: {5}{B}{B} Each player mills ten cards. For each player, choose a creature or planeswalker card in that player's graveyard. Put those cards onto the battlefield under your control. Then each creature you control becomes a Phyrexian in addition to its other types.