Poison kills at the end of the day instead of end of the night.
i.e. Night 1 u poison someone, at the end of day 2 they die of poison but during the day they can talk and vote and whatnot. Instead of them dying at the end of that night. This is a buff because mafia won't waste their kill on someone that has already died of poison.
Also poisoner should auto poison role-blockers or be role block immune.
I LOVE POISONER!