Is Mausoleum Secrets legal in Standard, Modern, and Commander?

Mausoleum Secrets is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Mausoleum Secrets

Q: What type of card is Mausoleum Secrets?

Mausoleum Secrets is an Instant. Its oracle text reads: "Undergrowth — Search your library for a black card with mana value less than or equal to the number of creature cards in your graveyard, reveal it, put it into your hand, then shuffle."

Instant

Undergrowth — Search your library for a black card with mana value less than or equal to the number of creature cards in your graveyard, reveal it, put it into your hand, then shuffle.

Set Guilds of Ravnica

Rarity Rare

Mana Value 2

Artist Adam Paquette

Collector # 75

Scryfall