Is Fear of Change legal in Standard, Modern, and Commander?

Fear of Change is legal in: Historic.

Fear of Change

Q: What type of card is Fear of Change?

Fear of Change is an Enchantment Creature — Nightmare. Its oracle text reads: "When this creature enters or dies, exile another creature you control. If you do, conjure a duplicate of a random creature card with mana value X onto the battlefield, where X is 2 plus the exiled creature's mana value. Power/Toughness: 2/3"

Enchantment Creature — Nightmare

When this creature enters or dies, exile another creature you control. If you do, conjure a duplicate of a random creature card with mana value X onto the battlefield, where X is 2 plus the exiled creature's mana value.

Power/Toughness: 2/3

Set Alchemy: Duskmourn

Rarity Uncommon

Mana Value 2

Artist Maxime Minard

Collector # 21

Scryfall