Is Roadkill Rodney legal in Standard, Modern, and Commander?

Roadkill Rodney is legal in: Legacy, Vintage, Commander.

Roadkill Rodney

Q: What type of card is Roadkill Rodney?

Roadkill Rodney is an Artifact Creature — Robot. Its oracle text reads: "Squad {3} (As an additional cost to cast this spell, you may pay {3} any number of times. When this creature enters, create that many tokens that are copies of it.) Deathtouch Whenever this creature deals combat damage to a player, create a Mutagen token."

Artifact Creature — Robot

Squad (As an additional cost to cast this spell, you may pay any number of times. When this creature enters, create that many tokens that are copies of it.)