Colombo, Detective Savant

(This spell cannot be countered.)
Hexproof, unblockable
Whenever this creature does combat
damage to a player draw a card.
At the beginning of your upkeep, create
a clue token.Whenever a creature you control dies
create a clue token. If the creature is a
human create two clues instead.
Clue sacrifice cost is reduced to {0}.
(If you control eight or more Clue
tokens you win the game.)