Is Elephant Grass legal in Standard, Modern, and Commander?

Elephant Grass is legal in: Legacy, Vintage, Commander.

Elephant Grass

Q: What type of card is Elephant Grass?

Elephant Grass is an Enchantment. Its oracle text reads: "Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)Black creatures can't attack you.Nonblack creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you."

Enchantment

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)<br>Black creatures can't attack you.<br>Nonblack creatures can't attack you unless their controller pays for each creature they control that's attacking you.