Is Ebonblade Reaper legal in Standard, Modern, and Commander?

Ebonblade Reaper is legal in: Legacy, Vintage, Commander.

Ebonblade Reaper

Q: What type of card is Ebonblade Reaper?

Ebonblade Reaper is a Creature — Human Cleric. Its oracle text reads: "Whenever this creature attacks, you lose half your life, rounded up. Whenever this creature deals combat damage to a player, that player loses half their life, rounded up. Morph {3}{B}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)"