Is Consuming Corruption legal in Standard, Modern, and Commander?

Consuming Corruption is legal in: Modern, Legacy, Vintage, Commander, Historic.

Consuming Corruption

Q: What type of card is Consuming Corruption?

Consuming Corruption is an Instant. Its oracle text reads: "Consuming Corruption deals X damage to target creature or planeswalker and you gain X life, where X is the number of Swamps you control. *While crossing the mire, Lort the Sneaky found the perfect shortcut to the end of his life.*"