Ulvenwald Mysteries is a uncommon Enchantment card from Shadows over Innistrad Remastered (SIR), collector number 223.
Whenever a nontoken creature you control dies, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.") Whenever you sacrifice a Clue, create a 1/1 white Human Soldier creature token.