Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
At the beginning of your end step,
investigate (To investigate, create a colorless Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.") for each opponent who lost life this turn.
Whenever a
Clue (A Clue is an an artifact with ", Sacrifice this artifact: Draw a card.") you control is put into a graveyard from the battlefield, create a 1/1 white and black Spirit creature token with
flying (This creature can't be blocked except by creatures with flying or reach.). This ability triggers only once each turn.