Vexes are a type of hostile mob found in the game Minecraft. They are small, flying creatures that are summoned by Evokers, a type of illager. Vexes can pass through blocks and are known for their agility, making them difficult to hit. They attack players and other mobs by dealing damage with their melee attacks. When defeated, Vexes drop experience orbs and can be a nuisance during battles, especially in raids. They have a unique ability to teleport to their summoner if they are too far away, which adds to their challenge. Players often need to strategize to effectively deal with them.