Card Spotlight
A three-mana 2/1 green creature. When it enters, you may return any card from your graveyard to your hand.
Commander Spotlight
Eternal Witness ↗
A three-mana 2/1 green creature. When it enters, you may return any card from your graveyard to your hand.
See Eternal Witness's full stats and printings →
It isn't legendary, so it can't be a commander. It goes in the 99 of a green deck.
A strong include in nearly any green deck. The only decks that skip it are ones with nothing worth getting back or no room for a three-mana 2/1.
Ghostly Flicker ↗
Blinks Witness and another permanent, and Witness can return Ghostly Flicker, so you can repeat the loop for {2}{U} each time.
Conjurer's Closet ↗
Blinks a creature at each of your end steps, so Witness returns a card every turn.
Ephemerate ↗
Blinks Witness for {W}, then rebounds to do it again next upkeep, for two returned cards.
Survival of the Fittest ↗
Finds Witness on demand by discarding another creature, which Witness can then return to hand.
Eternal Witness is inexpensive. It was printed in Fifth Dawn and has been reprinted many times since, including Time Spiral Remastered, Double Masters 2022 and Commander Masters. Buy the cheapest printing; there's no gameplay reason to pay more.
It returns any card from your graveyard, including instants, sorceries and lands, and it leaves a body behind. That makes it a two-for-one in almost every green deck: get back the removal spell, the ramp spell or the creature that died, and keep a creature on the battlefield.
No. It's legal in Commander and isn't on the Game Changers list, so it's allowed in every bracket.
Whatever the game needs most. Early on that is often a ramp spell or a land; later it is a removal spell, a board wipe or the combo piece an opponent answered. The flexibility is the reason to run it.