Is Thoughtleech legal in Standard, Modern, and Commander?

Thoughtleech is legal in: Legacy, Vintage, Commander.

What type of card is Thoughtleech?

Thoughtleech is an Enchantment. Its oracle text reads: "Whenever an Island an opponent controls becomes tapped, you may gain 1 life."

Enchantment

Whenever an Island an opponent controls becomes tapped, you may gain 1 life.

Set Ice Age

Rarity Uncommon

Artist Mark Tedin

Enchantment Commander Legacy Vintage