Is Woeleecher legal in Standard, Modern, and Commander?

Woeleecher is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Woeleecher

Q: What type of card is Woeleecher?

Woeleecher is a Creature — Elemental. Its oracle text reads: "{W}, {T}: Remove a -1/-1 counter from target creature. If you do, you gain 2 life. *One head senses the curse. The second loosens it from the soul. The third drinks it as an invigorating mist.* Power/Toughness: 3/5"