Is River Herald Guide legal in Standard, Modern, and Commander?

River Herald Guide is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

River Herald Guide

Q: What type of card is River Herald Guide?

River Herald Guide is a Creature — Merfolk Scout. Its oracle text reads: "Vigilance When this creature enters, it explores. (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

Vigilance

When this creature enters, it explores. (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.)

Set The Lost Caverns of Ixalan

Rarity Common

Mana Value 3

Artist David Astruga

Collector # 209

Scryfall Gatherer