Is Estwald Shieldbasher legal in Standard, Modern, and Commander?

Estwald Shieldbasher is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

What type of card is Estwald Shieldbasher?

Estwald Shieldbasher is a Creature — Human Soldier. Its oracle text reads: "Whenever this creature attacks, you may pay {1}. If you do, it gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)"

Estwald Shieldbasher

Creature — Human Soldier

Whenever this creature attacks, you may pay . If you do, it gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)