Is Dauthi Warlord legal in Standard, Modern, and Commander?

Dauthi Warlord is legal in: Legacy, Vintage, Commander.

Dauthi Warlord

Q: What type of card is Dauthi Warlord?

Dauthi Warlord is a Creature — Dauthi Soldier. Its oracle text reads: "Shadow (This creature can block or be blocked by only creatures with shadow.) Dauthi Warlord's power is equal to the number of creatures on the battlefield with shadow. Power/Toughness: */1"