Is Patrol Signaler legal in Standard, Modern, and Commander?

Patrol Signaler is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Patrol Signaler?

Patrol Signaler is a Creature — Kithkin Soldier. Its oracle text reads: "{1}{W}, {Q}: Create a 1/1 white Kithkin Soldier creature token. ({Q} is the untap symbol.) *Many a keen-eared bogle has run afoul of a clever and silently orchestrated kithkin ambush.* Power/Toughness: 1/1"