Is Tithe legal in Standard, Modern, and Commander?

Tithe is legal in: Legacy, Vintage, Commander.

Tithe

Q: What type of card is Tithe?

Tithe is an Instant. Its oracle text reads: "Search your library for a Plains card. If target opponent controls more lands than you, you may search your library for an additional Plains card. Reveal those cards, put them into your hand, then shuffle."

Instant

Search your library for a Plains card. If target opponent controls more lands than you, you may search your library for an additional Plains card. Reveal those cards, put them into your hand, then shuffle.

Set Visions

Rarity Rare

Artist Jon J Muth