Torture was used only to get a confession and wasn't meant to actually punish the accused heretic for his crimes. Some inquisitors used starvation, forced the accused to consume and hold vast quantities of water or other fluids, or heaped burning coals on parts of their body. 10 Most Frightening Torture Techniques from the This was a brutal punishment The head crusher was a popular torture method used by the Spanish Inquisition. Spanish Inquisition () He believed punishment of heretics, was the only way to achieve political and religious unity in Spain. Those.