mtg from the vault transform card list Magic: Gathering Set From the Vault: Transform

You can directly buy codes that will net you cards in MTGA

I actually dont think that General Kreat offers much as a commander, but shell go great in the 99 of decks such as Krenko, Mob Boss or Purphoros, God of the Forge that are already looking to throw massive amounts of tokens onto the battlefield to finish off opponents

The card game features a selection of 200 cards split into six different types of ink, each reflecting a certain kind of gameplay approach, with every card also being part of one of three main types: characters, items and songs

This green instant was introduced in 2012 with the release of Magic's Avacyn Restored set