Is Sinuous Benthisaur legal in Standard, Modern, and Commander?

Sinuous Benthisaur is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Sinuous Benthisaur

Q: What type of card is Sinuous Benthisaur?

Sinuous Benthisaur is a Creature — Dinosaur. Its oracle text reads: "When this creature enters, look at the top X cards of your library, where X is the number of Caves you control plus the number of Cave cards in your graveyard. Put two of those cards into your hand and the rest on the bottom of your library in a random order."

Creature — Dinosaur

When this creature enters, look at the top X cards of your library, where X is the number of Caves you control plus the number of Cave cards in your graveyard. Put two of those cards into your hand and the rest on the bottom of your library in a random order.

Set The Lost Caverns of Ixalan

Rarity Uncommon

Mana Value 6

Artist John Tedrick

Collector # 76

Scryfall Gatherer