Is Balduvian Warlord legal in Standard, Modern, and Commander?

Balduvian Warlord is legal in: Modern, Legacy, Vintage, Commander.

Balduvian Warlord

Q: What type of card is Balduvian Warlord?

Balduvian Warlord is a Creature — Human Barbarian. Its oracle text reads: "{T}: Remove target blocking creature from combat. Creatures it was blocking that hadn't become blocked by another creature this combat become unblocked, then it blocks an attacking creature of your choice. Activate only during the declare blockers step."

Creature — Human Barbarian

: Remove target blocking creature from combat. Creatures it was blocking that hadn't become blocked by another creature this combat become unblocked, then it blocks an attacking creature of your choice. Activate only during the declare blockers step.