Is Hylda's Crown of Winter legal in Standard, Modern, and Commander?

Hylda's Crown of Winter is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Hylda's Crown of Winter?

Hylda's Crown of Winter is a Legendary Artifact. Its oracle text reads: "{1}, {T}: Tap target creature. This ability costs {1} less to activate during your turn. {3}, Sacrifice Hylda's Crown of Winter: Draw a card for each tapped creature your opponents control."