Is Brighthearth Banneret legal in Standard, Modern, and Commander?

Brighthearth Banneret is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Brighthearth Banneret?

Brighthearth Banneret is a Creature — Elemental Warrior. Its oracle text reads: "Elemental spells and Warrior spells you cast cost {1} less to cast. Reinforce 1—{1}{R} ({1}{R}, Discard this card: Put a +1/+1 counter on target creature.) *The banner symbolizes the goodwill of the Brighthearth. Their emissaries bring the mastery of fire to other races.* Power/Toughness: 1/1"