Is Combat Research legal in Standard, Modern, and Commander?

Combat Research is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Combat Research

Q: What type of card is Combat Research?

Combat Research is an Enchantment — Aura. Its oracle text reads: "Enchant creature Enchanted creature has "Whenever this creature deals combat damage to a player, draw a card." As long as enchanted creature is legendary, it gets +1/+1 and has ward {1}. (Whenever enchanted creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.)"

Enchantment — Aura

Enchant creature

Enchanted creature has "Whenever this creature deals combat damage to a player, draw a card."

As long as enchanted creature is legendary, it gets +1/+1 and has ward . (Whenever enchanted creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)