Is Dwarven Armorer legal in Standard, Modern, and Commander?

Dwarven Armorer is legal in: Legacy, Vintage, Commander.

What type of card is Dwarven Armorer?

Dwarven Armorer is a Creature — Dwarf. Its oracle text reads: "{R}, {T}, Discard a card: Put a +0/+1 counter or a +1/+0 counter on target creature."

Creature — Dwarf

, , Discard a card: Put a +0/+1 counter or a +1/+0 counter on target creature.

Set Fallen Empires

Rarity Rare

Artist Bryon Wackwitz

Creature Commander Legacy Vintage