To start playing Blood on the Clocktower, first choose an edition from the three available in the grimoire. Then, select the characters you want to play with based on the edition. Hand out the character cards to each player secretly. The game involves players using deduction and deception to figure out who the murderers are or to deceive others as a murderer. Pay close attention to what other players say and look for logical inconsistencies. As for maintenance, keep the grimoire and character cards in a dry place to prevent damage. Avoid bending or folding the cards. If the cards get dirty, gently wipe them with a soft, dry cloth. Have fun playing and enjoy the mysterious journey!