slander others so they become mortified

I will spare those who oppose my lordship no mercy. Slander will be the least of my punishments, as my bid for world domination reaches its ultimate success. Still, slander can be a very effective tool to destroy the credibility of one’s enemies. I shall use it often, and I am open to any hints or creative insights on how to best use this weapon of ultimate humiliation. Provide a good tip for me, and I may be merciful at your time of judgement.
Take care for now,
Sir Bob