Is Rydia, Summoner of Mist legal in Standard, Modern, and Commander?

Rydia, Summoner of Mist is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Rydia, Summoner of Mist?

Rydia, Summoner of Mist is a Legendary Creature — Human Shaman. Its oracle text reads: "Landfall — Whenever a land you control enters, you may discard a card. If you do, draw a card. Summon — {X}, {T}: Return target Saga card with mana value X from your graveyard to the battlefield with a finality counter on it. It gains haste until end of turn. Activate only as a sorcery."

Rydia, Summoner of Mist

Legendary Creature — Human Shaman

Landfall — Whenever a land you control enters, you may discard a card. If you do, draw a card.

Summon — , : Return target Saga card with mana value X from your graveyard to the battlefield with a finality counter on it. It gains haste until end of turn. Activate only as a sorcery.