The caster must speak the curse while touching the victim.

The victim does not feel the curse until he makes the first strike/shot against any target.

The damage caused to a target by a hit from the cursed one comes back to him 1 to 1, he suffers the same hits as the attacked one. The curse lasts magic level attacks from the cursed.

The curse can be broken by countermagic, divine work or a blessing. Likewise, the curse ends if the caster drops the spell or becomes unconscious.