Is Exploding Barrel legal in Standard, Modern, and Commander?

Exploding Barrel is legal in: Legacy, Vintage, Commander.

Exploding Barrel

Q: What type of card is Exploding Barrel?

Exploding Barrel is an Artifact. Its oracle text reads: "{T}: Add one mana of any color. Put a pressure counter on this artifact. {8}, {T}, Sacrifice this artifact: It deals 20 damage to target creature. This ability costs {1} less to activate for each pressure counter on this artifact. Activate only as a sorcery."

Artifact

: Add one mana of any color. Put a pressure counter on this artifact.

, , Sacrifice this artifact: It deals 20 damage to target creature. This ability costs less to activate for each pressure counter on this artifact. Activate only as a sorcery.