“Horror” is a creature type, not a specific card. If you’re looking for notable “Horror” creatures, here are some examples:
- “Phyrexian Rager” (Black): Draws a card and loses life when it enters.
- “Gilt-Leaf Winnower” (Black): Destroys non-equal power/toughness creatures when it enters.
- “Lord of the Void” (Black): Exiles cards from opponent’s library and may put creatures into play on attack.
These are all black, matching most “Horror” creatures.