Nightmare

Commanders that run Nightmare most

Deck counts from EDHREC.

• Korlash, Heir to Blackblade: 826 decks
• Ob Nixilis, the Fallen: 382 decks
• Sima Yi, Wei Field Marshal: 57 decks
• Spirit of the Night: 49 decks
• Maga, Traitor to Mortals: 42 decks
• Ihsan's Shade: 30 decks
• Ascendant Evincar: 30 decks
• Yargle, Glutton of Urborg: 22 decks

Often played with Nightmare

Cards that show up in the same decks on EDHREC.

• Shield Mare
• Armored Warhorse
• Lightning Mare
• Vine Mare
• Wandermare
• Timbermare
• Thundermare
• Phyrexian Warhorse
• Temur Charger
• Squelching Leeches

Rulings

• 2008-04-01: If you control 0 swamps, then the Nightmare has 0 toughness and will be put into its owner’s graveyard as a state-based action right before the next player gains priority.
• 2009-10-01: Nightmare’s power and toughness changes as the number of Swamps you control changes.
• 2013-07-01: Nightmare’s ability counts all lands you control with the subtype Swamp, not just ones named Swamp.
• 2013-07-01: The ability that defines Nightmare’s power and toughness works everywhere, not just on the battlefield.