Is Earthlink legal in Standard, Modern, and Commander?

Earthlink is legal in: Legacy, Vintage, Commander.

What type of card is Earthlink?

Earthlink is an Enchantment. Its oracle text reads: "At the beginning of your upkeep, sacrifice Earthlink unless you pay {2}.Whenever a creature dies, that creature's controller sacrifices a land of their choice."

Earthlink

Enchantment

At the beginning of your upkeep, sacrifice Earthlink unless you pay .<br>Whenever a creature dies, that creature's controller sacrifices a land of their choice.