Is Stromkirk Mentor legal in Standard, Modern, and Commander?

Stromkirk Mentor is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper.

Stromkirk Mentor

Q: What type of card is Stromkirk Mentor?

Stromkirk Mentor is a Creature — Vampire Soldier. Its oracle text reads: "When this creature enters, put a +1/+1 counter on another target Vampire you control. *The lineage of Runo Stromkirk is known for producing some of Nephalia's greatest fencing masters.* Power/Toughness: 4/2"