Bosses respawn is random. random during the day. I can recommend you to check the site https://www.tibiabosses.com/ where you can select your server and see approximate time of respawn of certain bosses. All you need to do is to check them regurarly/wait for white announcement on the screen and with some luck kill the boss.
TibiaQA.com is a fansite. Please note that the only official website is Tibia.com. The game Tibia and the website Tibia.com are copyrighted by CipSoft GmbH.
