Elmar, Ulvenwald Informant is a rare Legendary Creature — Human card from Universes Within (SLX), collector number 4. Current market price: $0.36, TCGplayer market prices via Scryfall.
Haste Whenever you cast your second spell each turn, untap target creature, then investigate. (Create a colorless Clue artifact token with "{2}, Sacrifice this artifact: Draw a card.") Partner—Friends forever (You can have two commanders if both have this ability.)