Is Mirrorshell Crab legal in Standard, Modern, and Commander?

Mirrorshell Crab is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Mirrorshell Crab

Q: What type of card is Mirrorshell Crab?

Mirrorshell Crab is an Artifact Creature — Crab. Its oracle text reads: "Ward {3} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {3}.) Channel — {2}{U}, Discard this card: Counter target spell or ability unless its controller pays {3}."