Is Wormwood Dryad legal in Standard, Modern, and Commander?

Wormwood Dryad is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Wormwood Dryad?

Wormwood Dryad is a Creature — Dryad. Its oracle text reads: "{G}: This creature gains forestwalk until end of turn and deals 1 damage to you. (It can't be blocked as long as defending player controls a Forest.) {B}: This creature gains swampwalk until end of turn and deals 1 damage to you. (It can't be blocked as long as defending player controls a Swamp.) Power/Toughness: 3/1"