Is Lys Alana Dignitary legal in Standard, Modern, and Commander?

Lys Alana Dignitary is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Lys Alana Dignitary?

Lys Alana Dignitary is a Creature — Elf Advisor. Its oracle text reads: "As an additional cost to cast this spell, behold an Elf or pay {2}. (To behold an Elf, choose an Elf you control or reveal an Elf card from your hand.) {T}: Add {G}{G}. Activate only if there is an Elf card in your graveyard."