Is Regeneration legal in Standard, Modern, and Commander?

Regeneration is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Regeneration?

Regeneration is an Enchantment — Aura. Its oracle text reads: "Enchant creature (Target a creature as you cast this. This card enters attached to that creature.){G}: Regenerate enchanted creature. (The next time that creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)"

Regeneration

Enchantment — Aura

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)<br>: Regenerate enchanted creature. (The next time that creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Set Limited Edition Alpha

Rarity Common

Artist Quinton Hoover