Is Cliffside Rescuer legal in Standard, Modern, and Commander?

Cliffside Rescuer is legal in: Legacy, Vintage, Commander.

Cliffside Rescuer

Q: What type of card is Cliffside Rescuer?

Cliffside Rescuer is a Creature — Kor Soldier. Its oracle text reads: "Vigilance {T}, Sacrifice this creature: Target permanent you control gains protection from each of your opponents until end of turn. (It can't be blocked, targeted, dealt damage, enchanted, or equipped by anything controlled by those players.)"

Creature — Kor Soldier

Vigilance

, Sacrifice this creature: Target permanent you control gains protection from each of your opponents until end of turn. (It can't be blocked, targeted, dealt damage, enchanted, or equipped by anything controlled by those players.)