Is Penance legal in Standard, Modern, and Commander?

Penance is legal in: Legacy, Vintage, Commander.

Penance

Q: What type of card is Penance?

Penance is an Enchantment. Its oracle text reads: "Put a card from your hand on top of your library: The next time a black or red source of your choice would deal damage this turn, prevent that damage."

Enchantment

Put a card from your hand on top of your library: The next time a black or red source of your choice would deal damage this turn, prevent that damage.

Set Exodus

Rarity Uncommon

Mana Value 3

Artist Terese Nielsen

Collector # 15

Scryfall Gatherer