Starts off with one knife.

Knife is able to stab/slash someone, who dies a day later.

Knife doesn't reveal knight.

If the person he kills is town, he realizes he must sacrifice himself for breaking the code of chivalry and dies.

If the person he kills is mafia/third party, he is able to continue fighting and receiving knives until he kills a town.

Sided with town.

*originally by AdmiralAckbarCereal