Is Dragonfly Swarm legal in Standard, Modern, and Commander?

Dragonfly Swarm is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Dragonfly Swarm?

Dragonfly Swarm is a Creature — Dragon Insect. Its oracle text reads: "Flying, ward {1} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.) This creature's power is equal to the number of noncreature, nonland cards in your graveyard. When this creature dies, if there's a Lesson card in your graveyard, draw a card."