mtg house of horrors commander decks Duskmourn: Horror Magic the Gathering: Duskmourn House

Chaos Whenever Vincent deals combat damage to an opponent, it deals that much damage to each other opponent if Vincent's power is 7 or greater

RG Landfall Aggro Signpost Uncommons: Gladiolus Amicitia and Rydia, Summoner of Mist Landfall is a classic RG mechanic thats somewhat well represented in this set

Mighty Morphers A lot of morph creatures have powerful effects when flipped, or can drastically change the combat situation when revealed post-blockers

Lorwyn Eclipsed has two decks, Teenage Mutant Ninja Turtles has one that stars all five Turtles, and Marvel is bringing four

They have information that you can't easily see from your hand, especially if you don't want to tip off your opponent that you have it

In decks that can stabilize or gain life back, this becomes one of the most efficient engines ever printed among MTG black cards