Is Ureni's Rebuff legal in Standard, Modern, and Commander?

Ureni's Rebuff is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Ureni's Rebuff

Q: What type of card is Ureni's Rebuff?

Ureni's Rebuff is a Sorcery. Its oracle text reads: "Return target creature to its owner's hand. Harmonize {5}{U} (You may cast this card from your graveyard for its harmonize cost. You may tap a creature you control to reduce that cost by {X}, where X is its power. Then exile this spell.)"

Sorcery

Return target creature to its owner's hand.

Harmonize (You may cast this card from your graveyard for its harmonize cost. You may tap a creature you control to reduce that cost by , where X is its power. Then exile this spell.)