If the inserted weapon is not a dagger or sword, nothing happens and you return to 3A.
Otherwise roll 2d6 once per sword/dagger inserted: 2 flying sword; 3 double combat dice; 4 melts; 5 destroys vampire/bat on contact; 6 -4 each combat roll; 7 +5 adds; 8 +20 adds next combat turn only; 9 takes 3 hits/turn for you; 10 glowing sword blinds monsters by one die; 11 singing sword may scare a monster on 6 after combat; 12 poisoned sword reduces monster rating by 5 each later turn after first hit.