Is Seeker of Sunlight legal in Standard, Modern, and Commander?

Seeker of Sunlight is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Seeker of Sunlight

Q: What type of card is Seeker of Sunlight?

Seeker of Sunlight is a Creature — Merfolk Scout. Its oracle text reads: "{2}{G}: This creature explores. Activate only as a sorcery. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)"

Creature — Merfolk Scout

: This creature explores. Activate only as a sorcery. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)