Is Helga, Skittish Seer legal in Standard, Modern, and Commander?

Helga, Skittish Seer is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Helga, Skittish Seer?

Helga, Skittish Seer is a Legendary Creature — Frog Druid. Its oracle text reads: "Whenever you cast a creature spell with mana value 4 or greater, you draw a card, gain 1 life, and put a +1/+1 counter on Helga. {T}: Add X mana of any one color, where X is Helga's power. Spend this mana only to cast creature spells with mana value 4 or greater or creature spells with {X} in their mana costs. Power/Toughness: 1/3"

Helga, Skittish Seer

Legendary Creature — Frog Druid

Whenever you cast a creature spell with mana value 4 or greater, you draw a card, gain 1 life, and put a +1/+1 counter on Helga.

: Add X mana of any one color, where X is Helga's power. Spend this mana only to cast creature spells with mana value 4 or greater or creature spells with in their mana costs.