Is Blue Scarab legal in Standard, Modern, and Commander?

Blue Scarab is legal in: Legacy, Vintage, Commander.

Blue Scarab

Q: What type of card is Blue Scarab?

Blue Scarab is an Enchantment — Aura. Its oracle text reads: "Enchant creatureEnchanted creature can't be blocked by blue creatures.Enchanted creature gets +2/+2 as long as an opponent controls a blue permanent."

Enchantment — Aura

Enchant creature<br>Enchanted creature can't be blocked by blue creatures.<br>Enchanted creature gets +2/+2 as long as an opponent controls a blue permanent.

Set Ice Age

Rarity Uncommon

Artist Amy Weber