Is Vigilant Sentry legal in Standard, Modern, and Commander?

Vigilant Sentry is legal in: Legacy, Vintage, Commander, Pauper.

Vigilant Sentry

Q: What type of card is Vigilant Sentry?

Vigilant Sentry is a Creature — Human Nomad. Its oracle text reads: "Threshold — As long as there are seven or more cards in your graveyard, this creature gets +1/+1 and has "{T}: Target attacking or blocking creature gets +3/+3 until end of turn.""

Creature — Human Nomad

Threshold — As long as there are seven or more cards in your graveyard, this creature gets +1/+1 and has ": Target attacking or blocking creature gets +3/+3 until end of turn."