Elmar, Ulvenwald Informant is a rare Legendary Creature — Human card from Secret Lair Drop (SLD), collector number 345. Current market price: $5.87 (foil $5.76), 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.)