Assassin began to concentrate. This was somewhat difficult -- he couldn't use magic, but he had to go on the instinct of the force he had felt, pulling upon the energies within his body, and create it in a viable form outside his body. Imagination? It couldn't hurt. After extensive concentration (he found that 'slashing' at the dummy helped), he did manage to produce a blade of energy in his hand.
"Interesting," he remarked.