Is Seasoned Dungeoneer legal in Standard, Modern, and Commander?

Seasoned Dungeoneer is legal in: Legacy, Vintage, Commander.

Seasoned Dungeoneer

Q: What type of card is Seasoned Dungeoneer?

Seasoned Dungeoneer is a Creature — Human Warrior. Its oracle text reads: "When this creature enters, you take the initiative. Whenever you attack, target attacking Cleric, Rogue, Warrior, or Wizard gains protection from creatures until end of turn. 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 the creature, then put the card back or put it into your graveyard.)"

Creature — Human Warrior

When this creature enters, you take the initiative.

Whenever you attack, target attacking Cleric, Rogue, Warrior, or Wizard gains protection from creatures until end of turn. 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 the creature, then put the card back or put it into your graveyard.)

Set Commander Legends: Battle for Baldur's Gate

Rarity Rare

Mana Value 4

Artist John Stanko

Collector # 660

Scryfall Gatherer