Is Knowledge Exploitation legal in Standard, Modern, and Commander?

Knowledge Exploitation is legal in: Modern, Legacy, Vintage, Commander.

Knowledge Exploitation

Q: What type of card is Knowledge Exploitation?

Knowledge Exploitation is a Kindred Sorcery — Rogue. Its oracle text reads: "Prowl {3}{U} (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Rogue.) Search target opponent's library for an instant or sorcery card. You may cast that card without paying its mana cost. Then that player shuffles."