Is Hidden Spider legal in Standard, Modern, and Commander?

Hidden Spider is legal in: Legacy, Vintage, Commander, Pauper.

Hidden Spider

Q: What type of card is Hidden Spider?

Hidden Spider is an Enchantment. Its oracle text reads: "When an opponent casts a creature spell with flying, if this permanent is an enchantment, it becomes a 3/5 Spider creature with reach. (It can block creatures with flying.)"

Enchantment

When an opponent casts a creature spell with flying, if this permanent is an enchantment, it becomes a 3/5 Spider creature with reach. (It can block creatures with flying.)

Set Urza's Saga

Rarity Common

Mana Value 1

Artist Thomas M. Baxa

Collector # 264

Scryfall Gatherer