SOI: Cross-archetype enablers

http://www.mtggoldfish.com/articles/cross-archetype-enablers-in-shadows-over-innistrad looks at which cards in Shadows over Innistead enabled multiple archetypes or themes. For instance, Macabre Waltz:

• enables Madness,
• is a sorcery and a noncreature for cards that care about those attributes,
• helps get 2 creatures for 1 card if you have cards that care about the number of creatures you control, and
• works well in Delirium decks since they’re likely to have multiple creatures in their graveyard.