Eloise, Nephalia Sleuth
Legendary Creature — Human Rogue, {3}{U}{B}
Oracle Text
Whenever another 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 token, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)