Is Lightshell Duo legal in Standard, Modern, and Commander?

Lightshell Duo is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Lightshell Duo

Q: What type of card is Lightshell Duo?

Lightshell Duo is a Creature — Rat Otter. Its oracle text reads: "Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) When this creature enters, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)"

Creature — Rat Otter

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

When this creature enters, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Set Foundations

Rarity Common

Mana Value 4

Artist Mariah Tekulve

Collector # 157

Scryfall Gatherer