The phrase "evil tyrant" refers to a ruler or leader who is extremely cruel, oppressive, and abuses their power. They often disregard the rights and well-being of others, causing a lot of suffering and hardship. Full definition
An ordinary LEGO minifigure, mistakenly thought to be the extraordinary MasterBuilder, is recruited to join a quest to stop evil tyrant Lord Business from gluing the universe together. (youtube.com)
Nuclear weapons have shown, however, the enormous danger of violence, whilst acts of genocide have made clear the deadly potential of evil tyrants. (religion-online.org)
Each of the worlds that you do visit has been invaded by evil tyrants and their armies. (thevitalounge.net)