Is Crosis, the Purger legal in Standard, Modern, and Commander?

Crosis, the Purger is legal in: Legacy, Vintage, Commander.

What type of card is Crosis, the Purger?

Crosis, the Purger is a Legendary Creature — Dragon. Its oracle text reads: "Flying Whenever Crosis deals combat damage to a player, you may pay {2}{B}. If you do, choose a color, then that player reveals their hand and discards all cards of that color."

Crosis, the Purger

Legendary Creature — Dragon

Flying

Whenever Crosis deals combat damage to a player, you may pay . If you do, choose a color, then that player reveals their hand and discards all cards of that color.