This guide will tell you how to solo King Calvus as a mage in Roblox Arcane Odyssey.
You need to stick with Blast and Pulsar moves. It is recommended to get pulsar as a mage and go full Mage. You have to start the fight with Pulsar and always stay on high ground at a distance so his moves do not hit you.
After that, use dodge to get them down and it’s not that difficult. After getting him into the second phase, use your ultimate art as it is very useful for the boss farming and it does incredible damage. You can kill the boss in one to two minutes. You just have to stay up, dodge left and right and use pulsar to take him down.