For many sci-fi and fantasy settings, the protagonist(s) will face off against a myriad of alien beasts and demonic horrors. In this topic, I'd like to see your best monsters ranging from creepy-crawlies to world-destroying threats. Anything goes, as long as someone in your setting would consider it a "monster". Take this opportunity to plug your stories too if you want, I'll take a look at 'em.
This here is my take on the "cyclops" monster.