Is Thirst legal in Standard, Modern, and Commander?

Thirst is legal in: Legacy, Vintage, Commander, Pauper.

What type of card is Thirst?

Thirst is an Enchantment — Aura. Its oracle text reads: "Enchant creatureWhen Thirst enters, tap enchanted creature.Enchanted creature doesn't untap during its controller's untap step.At the beginning of your upkeep, sacrifice Thirst unless you pay {U}."

Thirst

Enchantment — Aura

Enchant creature<br>When Thirst enters, tap enchanted creature.<br>Enchanted creature doesn't untap during its controller's untap step.<br>At the beginning of your upkeep, sacrifice Thirst unless you pay .

Set Mirage

Rarity Common

Artist Roger Raupp