What type of card is Fear of the Unknown?

Q: What type of card is Fear of the Unknown?

Fear of the Unknown is an Enchantment Creature — Nightmare. Its oracle text reads: "Trample When you cast this spell, choose a playtest card you own from outside the game. Exile it. You may cast that card as long as it remains exiled. Mana of any type can be spent to cast that spell. (In a sealed event, outside the game is your sideboard.)"

Fear of the Unknown

Enchantment Creature — Nightmare

Trample

When you cast this spell, choose a playtest card you own from outside the game. Exile it. You may cast that card as long as it remains exiled. Mana of any type can be spent to cast that spell. (In a sealed event, outside the game is your sideboard.)

Set Unknown Event

Rarity Rare

Mana Value 6

Collector # RC06b

Scryfall