Welcome to the forum. I hope you are enjoying your time with the trial version of iClone.
There isn't a direct animation that will allow limbs to be removed during swordfights but you could achieve the effect by using some creative editing and some editing of the skin opacity maps to make the appropriate limb appear missing.
There is almost always a workaround to meet most requirements with iClone.
Peter EdwardsForum Moderator
iClone Daily Blog