Is Jukai Preserver legal in Standard, Modern, and Commander?

Jukai Preserver is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Jukai Preserver

Q: What type of card is Jukai Preserver?

Jukai Preserver is an Enchantment Creature — Human Druid. Its oracle text reads: "When this creature enters, put a +1/+1 counter on target creature you control. Channel — {2}{G}, Discard this card: Put a +1/+1 counter on each of up to two target creatures you control."