2 large Black Candle
Place the candle in the cauldron or bowl, use candle wax from another black candle to cement the original black candle to the cauldron/bowl. Do this by dripping wax from the second candle. The candle should be tall enough to extend a few inches above the rim.
Fill the cauldron to the rim with fresh water, without wetting the candle's wick. Deep breathe meditate, clear your mind and light the candle. Visualize the suspected spell's power as residing within the candles flame. Sit quietly and concentrate on the candle. Then visualize the power flowing and growing within the candle's flame. As the candle burns down, its flame will eventually sputter and go out as it contacts the water. As soon as the water has extinguished the flame, the spell will be dispersed. See the spell's power explode into dust. Pour the water in the hole in the ground and bury the candle.